RaspiForBeginners

In this repository I'll document (now also with other cool people 🙌) everything I do with my new Raspberry Pi 3 just for fun and education.

You can use this repository as a beginners tutorial for your own Raspberry Pi [3] or probably learn something new and cool about it (or even help us to make this tutorial/repository better :).

Have fun with your Raspberry Pi 3! 😃

0. Other cool things

Outside of this tutorial you can find in this repository also:

A funny and short introduction into Linux and Bash (only in German for now) from denniskeller → find it in the directory linuxdemo (download the repository and openindex.html)
Some simple scripts in different languages if you want to get in touch with some programming languages
Other things if you have something cool and contribute it :D (links to cool websites and repositories are also allowed)

0.1 How to connect and use a camera with Python

(Advanced) Tutorial of how to make/use pictures/videos with your raspberry pi and python3.

0.2 How to connect and use GPIO pins

(Advanced) Tutorial of how to use the GPIO pins to turn LED's on, use external displays and such things with your raspberry pi and python3.

1. Get the hardware

But first what do we need to have fun with our Raspberry Pi 3?

Obviously order a Raspberry Pi 3 (I bought one from Amazon for 36€)
An at least an 8GB Micro SD Card (I've ordered a 32GB big one from Amazon for 16€)

The following things you probably already have: (you don't need them all for having fun but if you want to follow this tutorial)

USB Charger (5V 2A) with an Micro USB cable (or you can buy a specific power supply)
HDMI cable
Display with a HDMI port
Keyboard (USB)
Mouse (USB)
A computer (I have a Windows 10 Desktop - other desktop OSs' should be fine too)

2. Setup an OS

Your Raspberry Pi is in front of you and you want to play with it... but therefore you need an operating system. To install one you have many possibilities regarding the OS or rather Linux distribution (See here the official guide).

Let's install the default Raspbian OS onto the Raspberry Pi:

Therefore you need to download the current Raspbian distribution ("Jessie with desktop" did we download) directly from raspberry.org.
Then extract the ``.zip` file to get the image of the Linux distribution.
Because you can't just put an .img file on the Micro SD card you need to install a program that burns it onto the Micro SD Card like the open source program etcher. Install it, open it, choose the .img file, choose the correct drive and press flash.
Great, now you only need to safely eject the card and put it into your Raspberry Pi Micro SD Card slot. 👍

3. First start

Now we are ready to go and can finally start the Pi. 💪

Because you (or probably I) am not the best with the console let's start the Pi in the graphical user interface of the OS. Then it will behave the same like every other OS with a desktop.

To start it in GUI mode you need to at least once the following steps:

Connect the HDMI cable with your monitor.
If you want to interact with the Pi probably connect a mouse and keyboard via USB.
Now you can plugin the power supply or USB charger and connect it with the Micro USB port on the Raspberry to start it. (Power not until after everything is connected!)
Enjoy the fresh desktop of Raspbian because you automatically are logged in and so get straight to the desktop.

4. Security and network and more

Security

You get automatically logged in as the user pi with the default password raspberry.

But because everyone knows that a default password isn't such a great idea you might wanna consider doing this:

Change the default password (!!!)

To change the fault password there are two ways:

Graphical User Interface

Click the raspberry icon at the top left
Click Preferences
Click Raspberry Pi Configuration
In the new window you are now in the tab System
There you click the top button Change Password...
Now you input the current password raspberry and below two times a new, secure and long password (like IwouldLike666RaspberryPies:D)

Console

The console is the most powerful tool - it's so mighty that we will do (almost) every step also in the console. At first it's a bit strange, but thanks to a steep learning curve you will also soon like to work with it (seriously, it's totally worth it!). 😉

Click the console icon at the top left (icon looks a bit like this: >_)
Tada, you opened the mightiest tool and should be seeing something like this:

pi@raspberrypi:~ $ ▮

This means you are the user pi and logged in at the computer with the name raspberrypi.

now you can interact/talk with the OS/Linux distribution through typing in commands with your keyboard and pressing enter if your command stands there completely
the first command we gonna use is the command passwd and press enter:

pi@raspberrypi:~ $ passwd
Changing password for pi.
(current) UNIX password: ▮

Now you input your old (or right now default) password (raspberry) (don't get frightened because you can see nothing - it's normal that if you input passwords the console only listens and not prints stars (* ) or other things)

After you typed in the correct password you need to type in a new, secure and long password

pi@raspberrypi:~ $ passwd
Changing password for pi.
(current) UNIX password:
Enter new UNIX password: ▮

And after that type in this new password again

pi@raspberrypi:~ $ passwd
Changing password for pi.
(current) UNIX password:
Enter new UNIX password:
Retype new UNIX password: ▮

Nice job, you changed successfully the password of your Raspberry Pi over the console 😃👍

Deactivate the auto login at boot

Normally every time you start the Pi you get logged in immediately without typing in your password which is .... cool I guess, but we (or at least I) want to live a little bit more secure.

Because of that we want to change this so that every time you start the Pi you need to type in your credentials (through this way the possibility to forget your password is also minimized).

To change this we stay in the console or open it if it's closed and type in sudo raspi-config. (sudo is an abbreviation of "super user do" and allows Linux users to execute administrative programs that not every user should be able to run. Only the root user should be able to run them - for example not the guest user should be able to change these kind of things.)

pi@raspberrypi:~ $ sudo raspi-config▮

After you pressed enter you will find yourself in the middle of the Raspberry Pi Software Configuration Tool (raspi-config is the console name).

You now pilot the red selection with the arrow keys to 3 Boot Options Configure options for startup.

Then you press enter and select B1 Desktop / CLI Choose whether to boot into a des....

Then after you pressed enter you can choose what you want to boot in every time:

B1 Console              (boot OS in console only without GUI)
B2 Console Autologin    (boot OS in console and automatically be logged in)
B3 Desktop              (boot OS with a GUI)
B4 Desktop Autologin    (boot OS with a GUI and automatically be logged in)

We choose to always start with a GUI and without automatically be logged in. So we select B3 and press enter.

Network

Because we also want to talk with the Raspberry Pi in our home network or even want to get access to the world wide web we not even need to connect a lame old LAN cable (😜 - but we can do this nonetheless if we want to or have no WLAN router).

Since the Raspberry Pi 3 has a cool WLAN chip, and more if you want to know all the hardware parts, we can access the home network simply by clicking the WLAN symbol right next to the Bluetooth symbol at the top right. Then select the right network, click it, hopefully input a long and safe password and hurray! we are connected to the home network and have internet (if you have internet in your home network ;).

Resolution

Probably some of you have noticed that the desktop isn't full screen on some monitors like my 1920x1080 monitor. Let's change this so that we can fully enjoy the Raspberry Pi.

Resolution - Graphical User Interface

Click the raspberry icon at the top left
Click Preferences
Click Raspberry Pi Configuration
In the new window you are now in the tab System
There you click the button Set Resolution... and select your desired resolution
Than you also disable Underscan and after one fast reboot you are fully prepared "Es krachen zu lassen!" (German idiom - literally translated to "To let it crash!" - right translated to "To party hard!")

Resolution - Console

The cool thing is - you can do the whole thing also in the console and you already know how! You don't believe me?

Just open your console and start again the Raspberry Pi Software Configuration Tool with the command raspi-config
Then select 7 Advanced Options
Then select A2 Overscan
Then select No

Same thing if you want to change the resolution:

Select again 7 Advanced Options
Then select A5 Resolution
Then select Your desired resolution

WOW. This was fast! Now you have a small but cool computer that can do everything that your current computer can :)

(everything but being fast in Gaming, Web, Video ... ;) (Note: It can even play 1080p and can be used for normal browsing)

5. Connect it

Remote desktop connection

Update 18. August 2017

I just reset my Raspberry Pi 3 and followed my instructions. But when I tried to login via XRDP suddenly a different window popped up.

It worked fine as before but now it also supports the Microsoft Remote Desktop apps for Windows 10 and Android!

That means you now can use your Windows 10 clipboard on the remote desktop and more cool features if you want to!

(I don't know if you even need the following instructions - try without them and if it doesn't work follow them)

XRDP (Works fine with Windows)

I wanted to access the device everywhere from my Windows Desktop and my Windows Laptop so I though a remote desktop connection would be a perfect start (I have also only one monitor so.... yeah).

This means that you can mirror the whole Raspberry Pi GUI on your Windows Device (or also Linux) and using it while the Raspberry only needs to be connected to the power and the same network like your Computer (LAN or WLAN - also the router needs to be allowing this and not isolate every device on the network).

I had some problems while establishing the connection with the tutorial from Adam Riley on his blog, but thanks to this stack exchange thread and Shreyas Murali I could establish a remote desktop connection in... less than one minute:

First input this to remove the somehow problem creating vncserver things sudo apt-get remove xrdp vnc4server tightvncserver
Second install tightvncserver sudo apt-get install tightvncserver
and last but not least install xrdp sudo apt-get install xrdp
XRDP will automatically run after the installation.

One thing before we can start: You need to know the IP address of your Raspberry Pi on your home network.

If you do not know the address we can use our mighty console by using the command hostname -I. If you press enter you will see the IP address and mac address of your Raspberry Pi like 192.168.0.23 33ac:6589:a374:... just copy everything before the blank and you have the IP address or rather house number of your Pi in your network.

Now we can start on any Windows computer (over the program search) a remote desktop connection.

You input in the opened window the IP address of your Raspberry Pi and click connect
Than a strange window should open itself that asks for a username and password
You type in as your username pi and as password your your secure password

Voilà, there you have your Raspberry Pi desktop on your Windows computer.

XRDP method for Android

You can even remotely control your Pi via your ANDROID device:

It's a bit messy, but here are the things you need to do:

Install a virtual keyboard, because the android app can't handle essential inputs like -.
- sudo apt-get update - update the repositories
- sudo apt-get upgrade - upgrade the whole system (optional)
- sudo apt-get install matchbox-keyboard - install the virtual matchbox-keyboard keyboard
- sudo reboot - a reboot isn't really necessary but just do it quickly
You can now start it over the terminal with the command matchbox-keyboard
Download and install the android app RDP Remote Desktop aFreeRDP
Set everything up
- start the app and click the plus symbol in the top bar (add)
- now enter under Label how you want to name the connection
- for Host the IP address of the Pi
- for Credentials click it and enter your username and password
- now go to times back (press two times the back button) and save your changes
Enjoy your ANDROID remote control
- click the new created connection and go straight to the desktop of your Pi on your ANDROID device
- if you know want to execute commands just type in match + Tab and enter and you can input symbol's like - over the virtual console

Also because we set as automatic start of the Pi a GUI-start we now always login to the GUI of the Pi when we log ourselves in over a remote desktop connection without needing the raspberry connect to any cables but the power chord (and eventually your network cable if you do not have WLAN).

SSH (terminal) connection

But what if we don't want a GUI. A simple CLI is enough isn't it?

Because of this here are some services, that let you connect to your Pi so that you can interact with it via command line:

ConnectBot (Android, Open Source)

Here a simple and Open Source solution with which you can control your Pi over the terminal on your Android device:

Install the app via Play Store: ConnectBot
Open it and click the plus at the bottom right (+)
Click and expand the input filed username@hostname:port
- Now input your username in the filed username
- And input the IP address of your Pi
- Enter a nickname in the field Nickname
- Now conform your input by clicking the + at the top right
Click now the new entry in the list
A terminal will open itself and then a popup that asks if yo really want to connect - confirm
Then the terminal will say
```
Attempting 'password' authentication
```
and an input filed will popup right above your keyboard which will say Password:
Input the password for your username and click ENTER
Again wait roughly one or two seconds and Wooooosh you have full CLI control over your Pi over your Android device :launch:

But this is not the only way to do this. There are many clients that can do this for many OS's. For example here you have another SSH CLI client for Windows:

PuTTY (Windows, Open Source)

Also a very small but cool service for your Windows computer.

Install it over at their website (first link)
Open it and enter directly the IP address of your Pi (you are already in this but the input field is located under Session > Host Name (or IP address))
If you not always want to retype the IP address enter in the input filed Saved Sessions a name for the connection and click Save after you are ready
Now click Open at the bottom of the window
Type in the terminal that opened itself your username:
```
Login as: ▯
```
Input ENTER and now input the password of your account:
```
Login as: pi
[email protected]'s password: ▯
```

When you are ready press again ENTER and you are ready to rumble!

Login as: pi
[email protected]'s password: ▯

Text

More Text
Last login: Tue Aug 15 00:24:18 2017 fro 192.168.0.21
pi@raspberrypi:~ $ ▯

Tipp: You can enter full screen mode by clicking Ctrl + Right mouse key and exiting it like this any time (looks way more professional 😜)

File manager connection (SFTP over SSH)

The following services can you enable access to the file system of your Pi over the Secure Shell protocol:

Filezilla (Windows, Open Source)

Because of the Secure Shell protocol you can do even more cool things.

One of them is to remotely control the whole file system of your Raspberry Pi from for example your Windows computer over a program named FileZilla.

What do you need to do that you can do this?

First you need to activate SSH on your Raspberry Pi.

over the GUI: Preferences >> Raspberry Pi Configuration
or the CLI: sudo raspi-config >> 5 Interfacing Options >> P2 SSH >> Enable

Now you can switch to your Windows computer and download/install FileZilla from filezilla-project.org.

When you installed it launch it.

Then click in the upper left File >> Site manager
Now create a new site with clicking the button New Site
On the right click the tab General
Now enter in the Host: text field the IP address of your Pi (hostname -I).
Choose as protocol the Secure File Transfer Protocol (SFTP)
The Logon Type: is Normal
Now enter your Pi username (pi)
and your long, secure & unique password

And you are ready to go. Just click Connect at the bottom left and you can see in the main window of FileZilla in the right file hierarchy the file system of your pi. Also you can copy, move, edit files from there.

source

Swish (Windows, Open Source)

If you want something more "native" under Windows you can use Swish, an native Windows SFTP client.

Just download the client here and install it on your Windows computer. Nothing changed?
Go to "my Device" in the Windows Explorer (there where you can see all your hard drives) and a new drive is there with the name "Swish"
Now double click it and click at the top in the banner "Add SFTP Connection"
Now input your desired name for the connection under Lable:
Add under Host: your IP address and under User: your username and you are ready to create the connection
Tipp: If you every time want to be directly in the home directory or in a specific directory enter your desired path under Path:
Now after you created the connection double click the new icon and enter your password for the inputted user: Your file system of the pi natively in the Windows Explorer 🙌

Solid Explorer File Manager (Android, Trial free)

Because I used this feature way to often I want to add this although I think I paid something for the app (if you have working alternatives message me and I will add them :).

There are obviously countless SFTP Alternatives but here it is really simple:

Start the app, click the plus (+) at the bottom right
Click New cloud connection
Choose SFTP and click Next at the bottom right
Enter the IP address of your Pi under Remote host name and enter optional a specific path
Enter a name for the connection under Display name
Because I don't want to get into complicated things (I for myself couldn't do it) we only use the username and password for now (If you know how to do it more securely over a private key message me or add it yourself :)
Click Next and add your username and password
Click Next and again Next and check everything, then again Next
And then finally click the big, fat Connect button
If you now open the hamburger menu you can directly get into the file system of your Pi on any Android device 😃

6. Welcome to the console :)

Introduction

The CLI (command line interface) is in contrast to the GUI (graphical user interface) solely text based.

This brings the advantage of printing out with very few commands small things like "Hello world!" to controlling and monitoring with some other commands a big server.

In addition, support is simpler due to the uniqueness of the commands.

If this is all Greek to you ("oder du verstehst bisher nur Banhof") just keep reading - it's really simple:

Start the console

If you booted in the CLI environment without starting the GUI (see 4.) you obviously are already in the console. And if you booted into the desktop GUI environment you can click the terminal icon on the top bar to start the console.

But there is a third way (if you booted with a GUI): You can press Ctrl + Alt + t to start the console everywhere without even touching the mouse.

If you now also want to go full screen just press Alt + Space and then x.

And if you want to close the terminal again just press Ctrl + Shift + q.

Shortcuts

Typing is is easy for you and with the arrow keys you already know how to get back and forth in the current command. So what can you possibly do better or faster you ask?... The answer is... a lot:

Ctrl + a brings you in no-time to the begin of your current command
Ctrl + e brings you in no-time to the end of your current command
Ctrl + x + x moves your cursor between the begin and the end of your current command

Ctrl + b move backward one character (same as ←)
Ctrl + f move forward one character (same as →)

Alt + b move backward one word (or go to the start of the currently cursor pointed word)
Alt + f move forward one word (or go to the end of the currently cursor pointed word)

Ctrl + k kills or better deletes everything of the current command from the begin to the current cursor position
Ctrl + w kills everything of the current command from the current cursor position to the end
Ctrl + u kills everything of the current command after the position where your cursor is
But all those shortcuts don't really kill or delete the text parts - they rather save them to a clipboard so that you can paste with the shortcut Ctrl + y these parts in your current command at your current cursor position

Ctrl + p replaces your current command with your previous entered command (in entered history)
Ctrl + n replaces your current command with your next entered command (in entered history)

Ctrl + c stops/aborts the current running program in the console/terminal
Ctrl + d stops every currently running program (closes the console in this case)
Ctrl + l cleans the whole terminal

Also there is the holy grail the Tab key. It completes commands, filenames, etcetera... If you press the Tab key again it will autocomplete to the next logical command, filename, etcetera...

Commands

Here are some simple commands you should know or are very helpful to know:

Text output command ("Hello world")

`echo`

echo + ... or "..." → output: ...

pi@raspberrypi:~ $ echo hello
hello
pi@raspberrypi:~ $ echo hello world!
hello world!
pi@raspberrypi:~ $ echo "hello world!"
hello world!
pi@raspberrypi:~ $ echo hello "world!" "what is happening?"
hello world! what is happening?hello "world!" "what is happening?"
pi@raspberrypi:~ $ ▮

You can even print a multiline text. Just let a simple " open and then enter line for line new text. If you are ready close it with typing a simple ". In between them you can just type enter and a new line will come up:

pi@raspberrypi:~ $ echo hello "world! now press enter
> hello world! in a new line :o and now \"enter again\"
> wow again a new line... now we want to end by typing a " and pressing enter
hello world! now press enter
hello world! in a new line :o and now "enter again"
wow again a new line... now we want to end by typing a  and pressing enter
pi@raspberrypi:~ $ ▮

File system commands

`ls`

stands for List directory contents and lists the current content of the folder you are in.

Wait a second - we are in a folder?

That's right. The console is always in a specific directory which enables many possibilities you will later learn about. With this command you can list the contents of the current directory your console is.

Folders are in the case of the default Pi terminal blue and files white.

pi@raspberrypi:~ $ ls
Desktop Documents Downloads Music Pictures Public python_games Templates Videos
pi@raspberrypi:~ $ ▮

But there are more things like only commands on Linux: There are also command options.

In the case of a directory listener you probably also want to know the size, date, and more:

-l → long listing - get a list with size and date of creation and ...

pi@raspberrypi:~ $ ls -l
total 36
drwxr-xr-x 2 pi pi 4096 Aug  1 14:59 Desktop
drwxr-xr-x 2 pi pi 4096 Aug  1 18:25 Documents
drwxr-xr-x 2 pi pi 4096 Aug  1 14:59 Downloads
drwxr-xr-x 2 pi pi 4096 Aug  1 14:59 Music
drwxr-xr-x 2 pi pi 4096 Aug  1 14:59 Pictures
drwxr-xr-x 2 pi pi 4096 Aug  1 14:59 Public
drwxr-xr-x 2 pi pi 4096 Jul  5 13:29 python_games
drwxr-xr-x 2 pi pi 4096 Aug  1 14:59 Templates
drwxr-xr-x 2 pi pi 4096 Aug  1 14:59 Videos
pi@raspberrypi:~ $ ▮

Explanation: (used source)

d stands for directory - l for a link - c for a character file
rwxr-xr-x are the permissions applied to this file also called octets
- the firs octet defines the permission for the file owner rwx
- the second octet defines the permissions defined for the group r-x
- the third and last part defines the permissions for everyone else r-x
  - The permissions are the following
    
    r w x
    
    read write execute
2 number of linked hard-links (links to that file/directory)
pi the owner of the file/directory
pi the group which this file/directory belongs to
4096 size of the file/directory
Aug 1 14:59 modification/creation date and time
Desktop the file/directory name

-a → shows not only the normal files, but also the hidden ones that start with a . (because in Linux everything (file,folder,device,command) is a file, a file that starts with a is a hidden file)

pi@raspberrypi:~ $ ls -a
.             .cache  Documents       .idlerc    .pki         .themes     .WolframEngine
..            .config Downloads       .local     .profile     .thumbnails .Xauthority
.bash_history .dbus   .gconf          .minecraft Public       Videos      .xsession-errors
.bash_logout  Desktop .gstreamer-0.10 Music      python_games .vnc        .xsession-errors.old
.bashrc       .dmrc   .gtkrc-2.0      Pictures   Templates    .Wofram
pi@raspberrypi:~ $ ▮

the cool thing with the command options are that you can just combine them in one simple command like:

pi@raspberrypi:~ $ ls -la
total 144
drwxr-xr-x 25 pi   pi   4096 Aug  4 14:46 .
drwxr-xr-x  3 root root 4096 Jul  5 12:41 ..
-rw-------  1 pi   pi   2162 Aug  4 01:26 .bashhistory
[too much unimportant code - I stop here]
pi@raspberrypi:~ $ ▮

Okay. So now we can find files in our current directory but can we probably also go into other directories?

Not a problem my friend:

`cd`

stands for change directory and will do the magic.

You just type in cd and after that your path - the directory you wanna go. In this case we want straight to the documents folder:

pi@raspberrypi:~ $ cd Documents
pi@raspberrypi:~/Documents $ ▮

WOW. Did you just see that? Wait a second, one more tip:

pi@raspberrypi:~/Documents $ cd ~
pi@raspberrypi:~ $ ▮

The thing after username@hostname: is the path where your console/terminal currently is. 😮

The odd ~ is the sign for your home directory. If you changed your directory so much, that you lost yourself just enter cd ~ and you are back home.

But there are more tricks:

With cd .. you go one folder upwards

pi@raspberrypi:~ $ cd Desktop
pi@raspberrypi:~/Desktop $ cd ..
pi@raspberrypi:~ $ ▮

Create/Edit/Delete/View files

Next we probably want to create files (that means folders and files):

`mkdir`

stands for Make directory and creates a directory with the name you write after it.

pi@raspberrypi:~ $ mkdir cool_folder
pi@raspberrypi:~ $ ls
cool_folder Desktop Documents Downloads Music Pictures Public python_games Templates Videos
pi@raspberrypi:~ $ mkdir cool_folder
mkdir: cannot create directory 'cool folder': File exists
pi@raspberrypi:~ $ mkdir Cool_folder
pi@raspberrypi:~ $ ls
cool_folder Desktop   Downloads Pictures python_games Videos
Cool_folder Documents Music     Public   Templates
pi@raspberrypi:~ $ ▮

Three things:

Creating a directory/folder is simple and you did it 🙌
If the directory already exists you get an error prompt (mkdir: cannot create directory 'cool folder': File exists)
If you come from a Windows computer you probably wondered why there was no error prompt after I created first the folder cool folder and then Cool folder without any kind of error prompt. That is because of Linux. The file system is in contrast to Windows - if you put it simply - not case sensitive. You can create files and folders with the same name as long as there is a difference in large or lower case. On Windows computers you can't do this. Every file in a directory there can only have a unique name.
Wait a second, I want also to create files 😞...

`touch`

creates a file with the name you write after it. 😃

pi@raspberrypi:~ $ touch cool_file
pi@raspberrypi:~ $ ls
cool_file   Cool_folder Documents Music    Public       Templates
cool_folder Desktop     Downloads Pictures python_games Videos
pi@raspberrypi:~ $ touch Cool_file
pi@raspberrypi:~ $ ls
cool_file cool_folder Desktop   Downloads Pictures python_games Videos
Cool_file Cool_folder Documents Music     Public   Templates
pi@raspberrypi:~ $ ▮

But attention: If a file (this means a folder or a file) already is named cool_file and you enter touch cool_file. There will be no error prompt and there also won't be created anything. In such a case touch updates the timestamp of the file that is named cool_file.

After we now know how to create directories and files here an additional example for a longer path while using the command cd:

pi@raspberrypi:~ $ mkdir Desktop/another_cool_directory
pi@raspberrypi:~ $ touch Desktop/another_cool_directory/hi
pi@raspberrypi:~ $ cd Desktop/another_cool_directory/
pi@raspberrypi:~Desktop/another_cool_directory $ ls
hi
pi@raspberrypi:~Desktop/another_cool_directory $ ▮

Another additional tip: If you - although the path is already in the console - want the whole path of the directory your currently at just enter pwd:

pi@raspberrypi:~Desktop/another_cool_directory $ pwd
/home/pi/Desktop/another_cool_directory
pi@raspberrypi:~Desktop/another_cool_directory $ ▮

Two things to go: Deleting files and viewing/editing them

Of course you could install programs that can do these things so much better (for example an advanced text editor like Vim), but for now we'll use the nano terminal editor, because it is already installed.

`nano`

is a simple text editor.

pi@raspberrypi:~ $ nano

If you enter this command in the terminal will start a new CLI where you can write text like in a normal text editor.. just you are still in the terminal.

When you are finished just use the shortcut Ctrl + x. Now (if you wrote something) the editor asks if it should save the things you wrote. If you press y you now just need to type in a name for your file.

The cool thing is you can not only do much more with nano and creating files, you can also really simple edit existing files:

pi@raspberrypi:~ $ nano existing_file

This will open the existing file named existing_file and you can edit the content of it. Saving is the same just quit nano with Ctrl + x and press y now just don't change the name of the file and you edited successfully a file.

`cat`

enables you to quickly view the content of a text file directly in the editor.

For example i just edit the existing_file in my home directory like in the command before and wrote Hello world! . When you now input cat existing_file you will see the content directly in the console:

pi@raspberrypi:~ $ cat existing_file
Hello world!
pi@raspberrypi:~ $ ▮

Create short files with `cat` in the Terminal

cat originally was written to concatenate 2 files, by writing the content from one File into another.

The command also can be used to write User input to a new File.

You only must use the > symbol, that instructs cat to write into the following file.

If the file not exist, it will be created. !Warning!: If the file already exist, it will be overwritten

pi@raspberrypi:~/test $ cat > hello.txt
Hello World!
this is a text test file
pi@raspberrypi:~/test $ ▮

After writing all the text, we can exit the editor with typing Ctrl + d.

Now we created a new File hello.txt and wrote some text in it.

We already know, how to display the content of a file with cat

pi@raspberrypi:~/test $ cat hello.txt
Hello World!
this is a text test file
pi@raspberrypi:~/test $ ▮

source

But how can you delete all these very unimportant files you created in the last 15 minutes?

`rm`

like remove [files].

Doesn't sound so difficult, doesn't it? Let's clean my desktop:

pi@raspberrypi:~/Desktop $ ls
another_cool_directory existing_file hi tut tut.txt
pi@raspberrypi:~/Desktop $ rm hi
pi@raspberrypi:~/Desktop $ rm tut.txt
pi@raspberrypi:~/Desktop $ ls
another_cool_directory existing_file tut
pi@raspberrypi:~/Desktop $ ▮

But if we try to remove a directory there is an error prompt... let's learn a new command:

`rmdir`

like remove directory.

pi@raspberrypi:~/Desktop $ ls
another_cool_directory existing_file tut
pi@raspberrypi:~/Desktop $ rm another_cool_directory
rm: cannot remove 'another_cool_directory': Is a directory
pi@raspberrypi:~/Desktop $ rmdir another_cool_directory
rmdir: cannot remove 'another_cool_directory': Directory is not empty
pi@raspberrypi:~/Desktop $ ▮

Okay. It seems like you only can delete empty directories. But of course we have a command for deleting also a not empty directory:

pi@raspberrypi:~/Desktop $ rm -r another_cool_directory
pi@raspberrypi:~/Desktop $ ls
existing_file tut
pi@raspberrypi:~/Desktop $ mkdir new_empty_directory
pi@raspberrypi:~/Desktop $ ls
existing_file new_empty_directory tut
pi@raspberrypi:~/Desktop $ rmdir new_empty_directory
pi@raspberrypi:~/Desktop $ ls
existing_file tut
pi@raspberrypi:~/Desktop $ ▮

Damn. You're really fast. Some cool and helpful things before we go on with next steps:

Find out more about commands

Another essential command is

`man`

like manual

Type this command and after it the command you want to know more about (what does it, what are the command options, etcetera...).

For example I want to know more about the command ls:

pi@raspberrypi:~ $ man ls

Then in the console/terminal a manual which you can scroll through opens, that contains all the information about the command ls. With pressing q you can leave the manual and are right back in the console/terminal. This works with every command.

Command history tricks

`history`

shows all the executed commands (very long! - my example is small)

pi@raspberrypi:~ $ history
   1  echo hi
   2  echo hello world
   3  echo hello "world"
   4  ls
   5  ls -l
   6  ls -a
   7  ls -la
   8  history
pi@raspberrypi:~ $ ▮

(with the shortcut Ctrl + r you can search this history and when you think it's long enough type in history -c to clear it)

`!!`

runs the last executed command

pi@raspberrypi:~ $ echo hello world!
hello world!
pi@raspberrypi:~ $ !!
echo hello world!
hello world!
pi@raspberrypi:~ $ ▮

Learn more commands and shortcuts

If you want to learn more shortcuts and commands (and believe us, there are so many) just search on the web. There are many sites (like our sources) that list cool commands and in the comments you will find more and more. The learning curve is very steep.

Source of many shortcuts and many that we didn't told about: skorks Source of many commands and many that we didn't told about: tecmint Even more commands: raspberrypi.org

Commands advanced

But there is even more that you can do with commands:

Queue commands

If you don't get queue think of it like a command playlist. You could do for example this:

pi@raspberrypi:~ $ cd Documents
pi@raspberrypi:~Documents $ mkdir Test
pi@raspberrypi:~Documents $ cd Test
pi@raspberrypi:~Documents/Test $ touch hi.txt
pi@raspberrypi:~Documents/Test $ cd ~
pi@raspberrypi:~ $ ▮

But this would require to input 4 commands and if you run programs you need to wait till one of the commands is ready and so on (like when you want to install many programs in a row).

Thanks to && this is not a problem. Just put && between the commands and exactly the same will happen without inputting each command after another, but with queuing them (or adding them to a playlist).

This will do the same as the last command line example:

pi@raspberrypi:~ $ cd Documents && mkdir Test && cd Test && touch hi.txt && cd ~
pi@raspberrypi:~ $ ▮

You can do this with every command that exists. It's just a simple playlist/queue.

Search CLI output

If you for example have a directory with 42 files and you enter the ls -l command you probably are pretty sure which file you are searching (or know something of the filename or know the file type).

To optimize the "long" search in such a case there is the command grep.

It's like a really simple regular expression text search that only displays lines in the CLI or files that contain a keyword you write after it. Input ls -l | grep 'keyword'

For a better understanding how grep works look at another example:

Search a text file

You are in this example a system admin at a cyber security organization and Alice forgot her password and asks you to give it to her. Because you have a text file with all the passwords of everyone in the form you have now the job to say her her password as fast as possible:

File: Documents/SecureFiles/nothingToSeeGoAway.txt

Password for:
Jules: 123456
ObiLan: IhaveTheHighGround
Mona: securePassword
Nick: areyoufreakingkiddingme
Thomas: saveTheseDamnPasswordsAsHashesAdmins!!
Bernd: WhyAliceAlwaysForgetsHerPassword?
Alice: WhyDoIAlwaysForgetMyPassword????3897584
Bob: aliceIsCool
Jim: HiDwight

(Disclaimer: Never save passwords like this: THIS IS JUST A SIMPLE EXAMPLE FOR grep)

You could now enter this:
```
pi@raspberrypi:~ $ cat Documents/SecureFiles/nothingToSeeGoAway.txt
```
and would get every line of the document. This would mean you would have to read every line...
But if you instantly only want the lines that contain "Alice" you obviously would use grep like this:
```
pi@raspberrypi:~ $ cat Documents/SecureFiles/nothingToSeeGoAway.txt | grep 'Alice'
Bernd: WhyAliceAlwaysForgetsHerPassword?
Alice: WhyDoIAlwaysForgetMyPassword????3897584
pi@raspberrypi:~ $ ▮
```
You see: You now only got the lines which contain the text "Alice". Plus: Per default the terminal highlights it for you (if not use the option --color)

There are also obviously many command options (read the man grep page therefore), but one cool option is the addition of i. The normal grep command searches case sensitive, with the command grep -i this isn't the case (BaDummTsss) and you now get every line that contains in some way Alice:

pi@raspberrypi:~ $ cat Documents/SecureFiles/nothingToSeeGoAway.txt | grep 'Alice'
Bernd: WhyAliceAlwaysForgetsHerPassword?
Alice: WhyDoIAlwaysForgetMyPassword????3897584
Bob: aliceIsCool
pi@raspberrypi:~ $ ▮

But there is even more besides `cat file | grep 'word'`

(Source of even more)

Search for a word directly in a text file:
```
grep 'word' filename
```
Search for a word directly in many text files:
```
grep 'word' file1 file2 file3
```
Search the current output in the terminal of a command for a word:
```
commandThatCreatesATextOutput | grep 'word'
```

7. Install additional software/programs

Installing programs is on Linux or rather on Raspbian quite different if you come from OSX or Windows.

Therefore here a quick and dirty explanation of operating systems and especially Linux:

The operating system

The kernel

The kernel is the core computer program. It has the full control over everything of the system and is the first thing that gets started on a computer start-up.

It handles all connected peripherals, input, output and thus controlling on what other programs having access to.

Systems like Windows and Linux have an underlying kernel.

Nevertheless there are big differences between especially these two besides that Linux is an open source developed and public viewable kernel and the Windows kernel is a cooperation secret.

Linux distributions and Windows

Probably you know Linux distributions better under the names Arch Linux, Debian, Fedora, Gentoo, Manjaro, Mint, Ubuntu, Raspbian, etcetera.

These so named distributions don't have specific kernels. They all have the same kernel, the Linux kernel. *

But only the kernel won't bring you far. Every system is only so useful as the programs that are installed on it. Like.. what would Windows be if you wouldn't have a GUI.

And because there are so many possible GUI's and file managers, file editors and network programs and even more programs that some people created distributions. They all consist of the Linux kernel and many chosen programs/packages.

You can think of Windows like the only distribution of the Windows kernel.

The cool thing about this on Linux distributions is that you can theoretically install every Linux program on every Linux distribution, this means also every GUI and so on.

* there are ways to strip a kernel down in size but they are nevertheless all based on one Linux kernel

How to install these... packages

It's quite simple how to install packages onto your Raspberry Pi running Raspbian:

Just type into the console apt-get install and enter to install the software:

pi@raspberrypi:~ $ sudo apt-get install <name of the software>

Why does this work? Every distribution has it's own repository where they all saved these packages that work well with their systems. By typing this you can download it and get the newest for your distribution available package of the software you want.

Example: Lets install Firefox

Normally on Windows you go to the Mozilla Firefox website go to the download page. Download the executable and run it. Then you wait till it's finished installing.

How's that on our Raspbian?

Funny thing I just found out: Firefox isn't listed in the console under it's real name (because it still supports flash which requires an x86 processor but the raspberry pi has an 64 bit ARM processor) but under the name Iceweasel. So let's cut to the chase:

pi@raspberrypi:~ $ sudo apt-get install iceweasel
.... text
pi@raspberrypi:~ $ ▮

Okay.... did we install it now or what did we do?

If it only was easy to start Firefox now... Let's try something:

pi@raspberrypi:~ $ iceweasel
pi@raspberrypi:~ $ ▮

Probably Firefox just launched and now you know it's installed.

Example: Lets install cowsay

To install this very important package just type in:

pi@raspberrypi:~ $ sudo apt-get install cowsay

After the installation you can now use this command:

pi@raspberrypi:~ $ cowsay Hi, I\'m a cow.

And enjoy the result. 😃 🐮

Example: Lets watch a movie

Before we can start and enjoy it, we must install telnet :

pi@raspberry:~ $ sudo apt-get install telnet

After the installation you can use this command and get surprised :3

pi@raspberry:~ $ telnet towel.blinkenlights.nl

*watching movie*

If you now (after watching the complete movie) want back to the console, without restarting it, you must type in the exit signs.

In this case we must type in Ctrl + ] and then quit .

My Problem was, that (idk why) the Tastatur layout was different during this command.

So i must guess were the bracket was and on my (German) Tastatur it was on the + Plus sign.

Sooo just try some Symbols, while holding Ctrl and you will find a way out of telnet ^^ (:thinking: "No! Try not! Do or do not, there is not try.") (<- that wasn't a hint which movie you gonna watch xP)

Thanks Simon Jansen. This is a Link to his created Java Applet of the Film

Website of the human, who host it

What can I do when a new version of my installed software gets released

That is also quite cool. Remember when I wrote that every distribution has it's own repository with all the latest packages of every program you install over the package manager apt?

That's very handy, because there is an command that compares all the versions and the kernel on your Raspberry Pi with the ones in the repository and updates the things that aren't latest on your Pi.

You therefore need to know two commands:

Update/Compare the local repositories with the latest repositories online
```
pi@raspberrypi:~ $ sudo apt-get update
```
Download the new packages (if there are any new ones)
```
pi@raspberrypi:~ $ sudo apt-get upgrade
```

When the command terminates all of your system software (kernel and over packages) should be the latest of your current distribution.

Remember, that apt is the paket-manager of Debian Derivates. If you're using arch/fedora/etc. you must search your own manager. Here a uncomplete List of some managers:

pacmanfor Arch Linux and (i think so) all Derivates
dnf on Fedora (since version 22) (older versions: yum, less powerfull)
I never used others but on this Wikipedia Site are written some more :)

8. Program on it

Scripting Languages

Scripts in the following languages just run with one command.

Bash

First let's create a bash script file:

pi@raspberrypi:~ $ nano

Then we just write a simple bash script in nano:

##!/bin/bash

## A Comment
echo "WOW You just executed a Bash script :o"

Then we save this by clicking Ctrl + x and y and entering the name bash_test_script.sh .

Now we can execute it:

pi@raspberrypi:~ $ bash bash_test_script.sh
WOW You just executed a Bash script :o
pi@raspberrypi:~ $ ▮

Python

First let's create a python script file:

pi@raspberrypi:~ $ nano

Then we just write a simple python script in nano:

"""Hello world script."""

## A comment
print("WOW You just executed a Python script :o")

Then we save this by clicking Ctrl + x and y and entering the name python_test_script.py .

Now we can execute it:

pi@raspberrypi:~ $ python python_test_script.py
WOW You just executed a Python script :o
pi@raspberrypi:~ $ ▮

But when we speak about python we have even more possibilities on the Pi.

If you enter python in the console you enter a live python editor where you can program live:

pi@raspberrypi:~ $ python
Python 2.7.9 (default, Sep 17 2016, 20:26:04)
[GCC 4.9.2] on linux2
Type "help", "copyright", "credits" or "license" for more inforamtion.
>>> ▮

Now we can do fun stuff in the terminal (everything we want to do):

>>> 2 + 40
42
>>> a = 2 + 6 * 7
>>> b = -2
>>> a + b
42
>>> ▮

With typing Ctrl + d you can exit the python console in the terminal again.

You even have one more option - to program on the python 3 console IDE.

If the console isn't preinstalled: install it :D. You should already know that. (hint: sudo apt-get install idle3)

And if it doesn't work, because you are using a ssh connection, then follow the instructions on this raspberrypi forum page (unfortunately i couldn't solve this Problem and i don't think that it's that important ) 🙈

To start it you can search and click the IDE icon or...

...we use the glorious mighty console:

pi@raspberrypi:~ $ idle3

Of course you can also open with this command directly any preexisting file like the one we just created:

pi@raspberrypi:~ $ idle3 python_test_script.py

Python 2 and 3

There are currently (2017) two versions of Python installed out of the box (on Raspbian). The language split itself a long time ago because of big differences (2008) and is right now only supported in version 2 for some years:

That means Python 2 which is default on Raspbian is not the future and 'the best' Python.

That means if you want to do more with Python (especially in the future) and don't want encoding problems and other things use Python 3!

You can very simple do this by using the following commands:

instead of python script.py use python3 script.py
instead of pip install module use pip3 install module

PHP

PHP is mostly used in combination with websites/webservers. The cool thing is that PHP is a server-side scripting language - this means the .php script will be executed on the webserver and the result of the script will be send to a user after he wanted to see the PHP file.

You can use this and make dynamic websites like this:

Let's create a PHP script file:

pi@raspberrypi:~ $ nano

Then we just write a simple PHP script in nano:

<html>
    <head>
        <title>PHP Test</title>
    </head>
    <body>
        <?php echo '<p>Hello World</p>'; ?>
    </body>
</html>

Looks just like a normal website beside the tag <?php ... ?> (the tag can appear everywhere in the document and also more than once). Everything that is between this tag will PHP convert to HTML content - the user isn't even able to see this code he just sees the following:

(Obviously first save this by clicking Ctrl + x and y and entering the name php_test_script.php)

pi@raspberrypi:~ $ php php_test_script.php
<html>
    <head>
        <title>PHP Test</title>
    </head>
    <body>
        <p>Hello World</p>
    </body>
</html>
pi@raspberrypi:~ $ ▮

Therefore, when you run a PHP server the server automatically does this conversion every time a user wants to see a .php document and get's back only a normal .html website.

You can easily install it with the command: sudo apt-get install php (on debian/-derivates)

Ruby

Let's create a Ruby script file:

pi@raspberrypi:~ $ nano

Then we just write a simple Ruby script in nano:

## A Ruby script

puts 'WOW You just executed a Ruby script :o'

now let's save this by clicking Ctrl + x and y and entering the name ruby_test_script.rb .

Now we can execute it (if its not installed: sudo apt-get install ruby (on debian/-derivates)):

pi@raspberrypi:~ $ ruby ruby_test_script.rb
WOW You just executed a Ruby script :o
pi@raspberrypi:~ $ ▮

Lua

Let's create a Lua script file:

pi@raspberrypi:~ $ nano

Then we just write a simple Lua script in nano:

-- A Lua script

print ("WOW You just executed a Lua script :o")

now let's save this by clicking Ctrl + x and y and entering the name lua_test_script.lua .

Now we can execute it:

pi@raspberrypi:~ $ lua lua_test_script.lua
WOW You just executed a Lua script :o
pi@raspberrypi:~ $ ▮

Compiled Languages

These languages need to be compiled before you can execute your written code.

C

First let's create a C script file:

pi@raspberrypi:~ $ nano

Then we just write a simple C script in nano:

##include <stdio.h>

main()
{
    printf("Hello world!\n");
}

Then we save this by clicking Ctrl + x and y and entering the name c_test_script.c .

But now there is a problem. C isn't a script language. It needs to be compiled before it can be executed.

So let's compile it to a executable file: (very interesting stack overflow answer to this problem)

pi@raspberrypi:~ $ gcc -Wall c_test_script.c -o executable_c_file
c_test_script.c:3:1: warning return type deafaults to ´int´ [Wreturn-type]
main()
 ^
c_test_script.c: In function ´main´:
c_test_script.c:6:1: warning: control reaches end of non-void function [Wreturn-type]
 }
 ^
pi@raspberrypi:~ $ ▮

We see all this (for now) not important comments/logs because through -Wall we enabled compiler warnings. This is really helpful for debugging a c program. GCC is the compiler that takes the code and converts it into an executable file. -o is needed to tell GCC to compile.

Now we can execute it:

pi@raspberrypi:~ $ ./executable_c_file
Hello world!
pi@raspberrypi:~ $ ▮

Java

First let's create a Java file:

pi@raspberrypi:~ $ nano

Then we just write a simple Java script in nano:

/**
 * Hello World program
 */
public class java_test_script {

    /**
     * Main method
     */
    public static void main(String[] args) {
        // A wild comment
        System.out.println("Hello world!");
    }

}

Then we save this by clicking Ctrl + x and y and entering the name java_test_script.java .

Now we have the same problem like C. We first need to compile our code before we can execute it:

pi@raspberrypi:~ $ javac java_test_script.java
pi@raspberrypi:~ $ ▮

This creates a executable file with the same name that we can now execute:

pi@raspberrypi:~ $ java java_test_script
Hello world!
pi@raspberrypi:~ $ ▮

If you are more interested to learn Java I can't recommend you more Eclipse. A great IDE to develop Java in and export it:

pi@raspberrypi:~ $ sudo apt-get update && sudo apt-get upgrade
pi@raspberrypi:~ $ sudo apt-get install eclipse

Then wait some minutes, eat something healthy, do some sport and then finally

pi@raspberrypi:~ $ eclipse

Oh wait, wait again some minutes ... and then... you are in the eclipse IDE 😃

Now you can develop really cool Java code in a GUI that checks every action you take so the compile process will never print errors if you follow eclipse ;)

Edit: Probably you will notice very soon that it's very slow (at least the startup time - when it's running it's okay) - but you can use it on your Windows PC or Linux PC without these very long start times.

C#

First let's create a C# file:

pi@raspberrypi:~ $ nano

Then we just write a simple C# script in nano:

using System;

// wild comment
class HelloWorld
{
    static void Main(string[] args)
    {
      Console.WriteLine("Hello World!");
    }
}

Then we save this by clicking Ctrl + x and y and entering the name cs_test_script.cs.

Now we have again the same problem like C - but without further preinstalled options.

Because of that let's install one:

pi@raspberrypi:~ $ sudo apt-get update
pi@raspberrypi:~ $ sudo apt-get install mono-complete▮

With mono you can compile and execute C# code.

After installing the complete .Net framework let's first compile our test code:

pi@raspberrypi:~ $ gmcs cs_test_script.cs
pi@raspberrypi:~ $ ▮

We have now created an executable named cs_test_script.exe, let's run it:

pi@raspberrypi:~ $ mono cs_test_script.exe
Hello World!
pi@raspberrypi:~ $ ▮

Tada, you just compiled and executed your probably first C# code!

C++

First let's create a C++ script file:

pi@raspberrypi:~ $ nano

Then we just write a "simple" C++ script in nano:

##include <iostream>

//very wild comment
int main() {
  std::cout << "Hello World!" << std::endl;
  //don't ask me (undefinedCoding) what 'std::cout <<'... etc. mean :see_no_evil:
  return 0;
}

Then we save this by clicking Ctrl + x and y and entering the name cpp_test_script.cpp .

So let's compile it to a executable file (we already installed the gcc Compiler while programming C):

pi@raspberrypi:~ $ g++ cpp_test_script.cpp -o executable_cpp_file
pi@raspberrypi:~ $ ▮

Now we can execute it:

pi@raspberrypi:~ $ ./executable_cpp_file
Hello World!
pi@raspberrypi:~ $ ▮

🐤

9. Set up a local webserver

A normal webserver (Apache)

First we install Apache:

pi@raspberrypi:~ $ sudo apt-get install apache2 -y

By default there will be an instant normal web server created (on your local network).

You can get it anywhere on your local network by typing in your current IP address (hostname -I) or local also under localhost into the browser search bar.

If you probably also want to change the content of your local server just got to the directory /var/www/html/ and edit for example the file index.html which will be displayed if someone enters the IP address of your Pi.

source

For example:

pi@raspberrypi:~ $ sudo rm /var/www/html/index.html
pi@raspberrypi:~ $ sudo touch /var/www/html/index.html
pi@raspberrypi:~ $ sudo nano /var/www/html/index.html

Then edit in nano the file index.html to the content Hello world!<br>This is HTML.

After saving this you should instantly by searching for the IP address of the Pi see these words on the website.

Enable SFTP in html directory (`chmod`)

If you use SFTP you probably noticed that FileZilla blocks uploads. With the following commands...

pi@raspberrypi:~ $ cd /var/www/
pi@raspberrypi:~/var/www $ sudo chmod a+w html
pi@raspberrypi:~/var/www $ sudo chmod a+w html/index.html
pi@raspberrypi:~/var/www $ ▮

...you give everyone writing rights in this folder and now everything should work with FileZilla.

If you want to know more about chmod look here: source

PHP server

When we want to use PHP there isn't much more we need to do.

Let's start by installing PHP5 and the Apache PHP5 module via the package manager:

pi@raspberrypi:~ $ sudo apt-get install php5 libapache2-mod-php5 -y

Because we used Apache before when setting up and running the normal webserver the web files are in the same directory as before and the IP address will be the same.

If you now visit the website again there should be no change.

But you can now use the PHP server based preprocessor. What that means? It means that you can compute things on the server - change text, load files, handle some things and etcetera - and then send a .html file back to the user that opened the website over the IP address.

This is really cool because the user not only doesn't know that the web page was preprocessed (has no access to important files or other) and you can develop simple dynamic pages with logins that are different for every user and so on. Just search the web if you are interested in PHP.

cool website for learning php

Small example

But here one small example.

Let's go back into the folder:

pi@raspberrypi:~ $ cd /var/www/html
pi@raspberrypi:/var/www/html $ ▮

Then remove the .html file:

pi@raspberrypi:/var/www/html $ rm index.html
pi@raspberrypi:/var/www/html $ ▮
```text
You also can change the Name of the File from index.html to index.php and then edit it:

```text
pi@raspberrypi:/var/www/html $ mv index.html index.php
pi@raspberrypi:/var/www/html $ ▮

(mv is the move command and in this case we "move" the old file into the new one)

And create a new php file with the following content with nano (or another text editor):

pi@raspberrypi:/var/www/html $ nano index.php

Content:

<!DOCTYPE html>
<html>
    <head>
        <title>Title: <?php echo "hello world"; ?></title>
    </head>
    <body>
        <h1>Heading</h1>
        <p>
            <?php
            $currentDateTime = date('Y-m-d H:i:s');
            echo "You've downloaded the webpage at ";
            echo $currentDateTime;
            echo ".";
            ?>
        </p>
    </body>
</html>

Now save the file and visit the webpage again (over the Pi's IP address):

You now should see (if you enter the IP address of the Pi in the browser) a webpage with the title "Title: hello world" and the webpage should have a heading named "Heading" and below it the current time when the webpage was loaded (like "You've downloaded the webpage at 2017-08-23 22:30:00.").

SQL server

Couldn't setup MySQL. If somebody out there was more successful than me please make a pull request or say me in another way how you could do it. (or commit it directly?) 🙈

SFTP server

Now something that is mostly only interesting for you at home but really great:

You can use your Raspberry Pi as a home network media center or also as an drive on Windows. All thanks to SFTP.

Secure File Transfer Protocol is not only way more secure (because it works over SSH), way more performant and more advanced than FTP (read this article for more detailed information), it's also really simple to work with when you want to setup a home network media center.

Windows Drive

Sadly Windows itself doesn't natively SFTP - only FTP - but there is a really fast and simple workaround for that:

Download Swish and install it on your Windows computer.
Because nothing changed.. what the hell did you do?
Go to "This Pc" in Windows Explorer and see that there is a new Drive named Swish.
Click Add SFTP Connection and enter again your IP Address, Username, enter as path /home/YOURUSERNAME and give it a name/label
Now double click on the created connection icon and enter your password (for your YOUSERNAME)

Now you can delete files, add them, rename them and more natively over your Windows Explorer.

Home network media center distribution (with Kodi as receiver)

But like we now want everywhere in the home network access to pictures, music and videos on our Raspberry Pi.

Nothing simpler than that thanks to Kodi. Kodi is an Open Source Media Center application that we will use because it is fast, Open Source, supports seamless SFTP and exists for Android, Windows (App store), Linux distributions, etcetera.

Install it on the device of your choice and start Kodi. (I did install it on my Android phone (6.0) and on my Amazon Fire TV stick).
Then, because you probably don't have any sources at the begin you will get asked Enter file section.
Now you click Add videos or Add Music or something else depending on where you clicked. (If nowhere you can read this, but you read Files click this)
A popup window will open itself and ask if you want to add any sources (for example Add video source.
Click browse to get into another popup window. There you want to click the list entry Add network location.
Because you want to connect to the Pi with the fast, secure and reliable SFTP protocol we change the protocol to Secure Shell (SSH / SFTP)
Now do the same thing you did so far every SFTP Setup and enter your Pi's IP address (@Server address, you username (@Username), your password (@Password) and click OK.
You will now get back to the list where you can browse through connected sources (Browse for new share) and can now simply click the sftp://YOURIPADDRESS:22 and browse to your folder that you want to add to this category (home/YOURUSERNAME/Music for example) and confirm the location.
Now Kodi will need some time to search through all your files, but when it's ready you can stream music, video, image, and more files seamless from your Pi to Kodi on every supported OS that is connected to your home network.

You can even add more things and do even more cool things with Kodi but this is not a Kodi tutorial - just how you can use this Open Source software to get a simple and secure, but also great home network media center.

DISCLAIMER: To get this working you first need a fast home network connection (at my place over old telephone lines and two routers and then over 5Ghz Wi-Fi to the Amazon Fire TV Stick I have around 80mbps). And because even the Pi has it's limits you need to accept that it cannot deliver many files to many users at the same time and also not big files to one person at a time. For me music, video and picture streaming was no problem, but a 4K video file of the Blender demo video "Tears of Steel" @6,27 GB could not be streamed (which was the case because of a mix of the bad home network bandwidth - but the main reason was I think the rather slow Pi). As long as you are in my range of hardware 1080p videos shouldn't be a problem for you and music/picture streaming should work great too.

10. Automated tasks scheduler (`cron`)

Link to the section about cron of the official Raspberry Pi documentation

Cron jobs are a really cool thing that you can use as Linux user.

Over the cron scheduler you can program to run script at a time you want every week/year/minute/hour/etcetera. And it's so easy to use on Raspbian because there is even a GUI version of it preinstalled.

Create a script for a `cron` job

You can at this point create whatever you want. Because this is a demo tutorial I will not setup a connection to a Mail API or something other, but the possibilities are endless.

We will just make a simple python script that creates a log entry every time the script runs - a simple demo of the mighty cron scheduler:

## -*- coding: utf-8 -*-

"""Python script for a cron job function demo."""

import datetime
import os

## this get's us the path of the PI's home directory
## this is important, because every cron job script will be
## run from the home directory - even when it's not there
PATH_HOME_DIR = os.path.expanduser('~')

## Directory where we want to create the log
PATH_FILE_DIR = os.path.join(
    PATH_HOME_DIR, 'Documents/GitHubBeta/RaspiForBeginners/scripts')

## Path of the log file
PATH_FILE = os.path.join(PATH_FILE_DIR, 'log.txt')

## Check if the directory exists, if not create it
if not os.path.exists(PATH_FILE_DIR):
    os.makedirs(PATH_FILE_DIR)

## get the current time
DATE_TIME = datetime.datetime.now()
DATE = DATE_TIME.date()  # gives date
TIME = DATE_TIME.time()  # gives time
DATE_STRING = str(DATE.year) + "-" + \
    str(DATE.month).zfill(2) + "-" + str(DATE.day).zfill(2)
TIME_STRING = str(TIME.hour).zfill(2) + ":" + \
    str(TIME.minute).zfill(2) + ":" + str(TIME.second).zfill(2)

## create a file and add the current time or if it exists just add the current time
with open(PATH_FILE, "a+") as text_file:
    text_file.write("The script was executed at " +
                    TIME_STRING + " on " + DATE_STRING + "\n")

## read file to the console (https://stackoverflow.com/a/5214587/7827128)
with open(PATH_FILE) as file:
    COMPLETE_FILE = file.readlines()

## strip every entry and print it to the console (remove '\n')
for rows in COMPLETE_FILE:
    print(rows.strip())

Every time this python script runs it will add an entry of the current time to the text file home/USERNAME/Documents/Documents/CronDemoLog/log.txt.

With this you can check if the cron scheduler works or not.

So let's copy it somewhere on the Pi (I copied it to home/USERNAME/script.py) and run it with the console:

pi@raspberrypi:~ $ python script.py
This script was executed at 14:7:0 on 2017-8-10
pi@raspberrypi:~ $ ▮

Your output should get one line more every time you enter this command:

pi@raspberrypi:~ $ python script.py
This script was executed at 14:7:0 on 2017-8-10
This script was executed at 14:8:8 on 2017-8-10
pi@raspberrypi:~ $ ▮

You can also always read the file by using cat:

pi@raspberrypi:~ $ cat Documents/CronDemoLog/log.txt
This script was executed at 14:7:0 on 2017-8-10
This script was executed at 14:8:8 on 2017-8-10
pi@raspberrypi:~ $ ▮

Create a `cron` job

Now we are ready to create our first cron job.

GUI

Therefore we start the GUI with the command:

pi@raspberrypi:~ $ gnome-schedule

If this doesn't work install the GUI with this command:

pi@raspberrypi:~ $ sudo apt-get update && sudo apt-get install gnome-schedule

Now that we opened the GUI click New at the top left
and in the popup window A task that launches recurrently
then enter a description and as command enter the command you used to run the script before (python script.py)
If you do not want to check if it works every hour go to Advanced and
click Edit at the same height as Minute
then click Every minute and confirm everything

[to continue skip the Terminal paragraph and continue with "Output"]

Terminal

Let's create our first cron job with the mighty console. Therefore we enter the following command:

pi@raspberrypi:~ $ crontab -e

Eventually you now also enter your favorite text editor - just enter the number of it (for beginners I recommend nano).

The document you see right now is a list of all cron jobs (should be empty if you never before created a cron job).

Example

This is how each line will look like - for example two lines from my current cron file:

*/12 * * * * python3 Documents/SubstitutePlanNotifierAEG/script.py
01 04 1 1 1 python3 Documents/NewYearSurpriseBot/script.py

Each line/cron job consists of

five time/date entries which are separated by a blank from another, then another blank
followed by a command that should be executed
followed by a newline character \n

Minute + `' '`	Hour + `' '`	Day + `' '`	Month + `' '`	Weekday + `' '`	Command	Newline (`\n`)
*/12	*	*	*	*	`python3[...]`	`\n`
Every 12 minutes	At all hours	Every day	Every month	Every weekday	Execute this command in the home directory	Entry is over
...	...	...	...	...	...

Explanation of each entry

Entry	Content
Minute + `' '`	a number between 0 and 59 + a space
Hour + `' '`	a number between 0 and 23 (0 = midnight) + a space
Day + `' '`	a number between 1 and 31 + a space
Month + `' '`	a number between 1 and 12 + a space
Weekday + `' '`	a number between 0 and 6 (0 = Sunday) + a space
Command	the command that should be executed in the home directory
Newline (`\n`)	cron job is no over - now you can declare in a new line a new cron job

Explanation of Operators

Operator	Use
*``**	If you enter an asterisk this means you want to execute the command every possible time. (if you enter an asterisk for the minute, hour, day, month, weekday the command will be executed every minute all day ... all year: `* * * * * command`)
`,`	If you for example want to run a command on Sunday and Saturday you can enter both numbers for the days and separating them with a comma: `* * * * 0,6 command`
`-`	If you want to execute the command all week but not on the weekend you can use the period operator: `* * * * 1-5 command`
*`/`**	But what if you want to run a command multiple times per time unit like for example every 10 minutes? You could enter `0,10,20,30,40,50 * * * * * command` but there is a better way if you use the asterisk slash operator: `/10 * * * * command` . `*/10` means that for all possible numbers modulo 10 == 0 (you divide every possible time/date unit number as long by 10 with rest till you only have a rest that is smaller than 10 and then look if the rest is zero) this script will be executed. In this case this would mean 0%10=0, 10%10=0, 20%10=0, 30%10=0, 40%10=0, 50%10=0 so it is the same as writing down `0,10,20,30,40,50`.

There is even more

Cron even supports special strings that can be used instead of the time/date units:

String	Meaning
`@reboot`	Execute command at startup
`@yearly`/`@annually`	Execute command when a new year begins (the same as `0 0 1 1 *`)
`@monthly`	Execute command when a new month begins (the same as `0 0 1 * *`)
`@weekly`	Execute command when a new week begins (the same as `0 0 * * 0` = week starts at Sunday!)
`@daily`/`@midnight`	Execute command when a new day begins (the same as `0 0 * * *` )
`@hourly`	Execute command when a new hour begins (the same as `0 * * * *`)

Add new cron job

Simply add a new line to the file you just have opened via crontab -e, enter either the five date/time entries separated by one space or a special string, then another space and the command you want to run at the just entered times. Now save the document and everything should work 😄.

For demo purposes we want to run the script every minute - this means we need to execute every minute (*), every hour (*), every day (*), every month (*), every weekday (*) and our command is python path/to/script.py (or other if you named the script different - always consider that this command will be run from the home directory [/home/username]). That means all in all one line should look like this:

* * * * * python path/to/script.py

If you want to run a script that needs root privileges (sudo) you need to access the cron document with:

pi@raspberrypi:~ $ sudo crontab -e

If you want to know more about cron jobs or crontab visit the man page or look here: https://help.ubuntu.com/community/CronHowto which was also the source of the Terminal paragraph.

Output

(But how can I be sure that this thing really works?)

Now wait some minutes and drink some water or tea or eat some fruits and vegetables . It's healthy :)

When you come back just run the same cat command you run before (cat Documents/CronDemoLog/log.txt) to see if it worked. It should look like this:

pi@raspberrypi:~ $ cat Documents/CronDemoLog/log.txt
This script was executed at 14:7:0 on 2017-8-10
This script was executed at 14:8:8 on 2017-8-10
This script was executed at 14:19:1 on 2017-8-10
This script was executed at 14:20:1 on 2017-8-10
This script was executed at 14:21:1 on 2017-8-10
pi@raspberrypi:~ $ ▮

That in mind I think you saw that the cron scheduler is really simple and mighty. You can run any script you want at specific times and dates. This gives you a whole lot of opportunities.

🙌

11. Speech recognition interaction

...

12. Work with the GPIO pins

...

Example with a LED

...

Example with an LCD display

...

Bonus: Manage users/groups

If you want to add a new user, remove a user or great groups for user this is also fairly simple:

Add a new user

To add a new user you really just need one command and to be the root user (sudo-rights):

pi@raspberrypi:~ $ sudo adduser newusername

Important note: The new user name can not contain caps like newUserName.

pi@raspberrypi:~ $ sudo adduser newusername
Adding user `newusername' ...
Adding new group `newusername' (1003) ...
Adding new user `newusername' (1002) with group `newusername' ...
Crating home directory `/home/newusername' ...
Copying files from `/etc/skel' ...
Enter new UNIX password: ▮

Now enter two times a new password for the new account:

Retype new UNIX password: ▮

And now you can add specific information about the user or just press ENTER for the default value:

passwd: password updated successfully
Changing the user information for the newusernam
Enter the new value, or press ENTER for the default
        Full Name []: New User Name▮

        Room Number []: ▮

        Work Phone []: ▮

        Home Phone []: ▮

If you are ready and everything is correct confirm by pressing y or deny by pressing n (and ENTER):

Is the information correct? [Y/n] ▮

Change the password of a user as sudo user

Probably you are not like me and forget the password of the new user after like ten seconds but hey, here you go:

pi@raspberrypi:~ $ sudo passwd newusername
Enter new UNIX password: ▮

Retype new UNIX password: ▮

passwd: password updated successfully
pi@raspberrypi:~ $ ▮

Change permissions of users to files

With Linux groups you can simple manage many user at once.

For example you can set permissions for some folders for every guest account at the same time.

This works because of in Linux every user has a unique user ID (UID) and a group ID (GID).

Source: yolinux

Therefore, if you remember 6. > Commands > File system > ls, the file system looks like this:

pi@raspberrypi:~ $ ls -l
total 36
drwxr-xr-x 2 pi pi 4096 Aug  1 14:59 Desktop
drwxr-xr-x 2 pi pi 4096 Aug  1 18:25 Documents
...

In which the first pi is the owner and the second one is the group where this file belongs to (remember that files stand in this case for directories d and normal files -, ...).

More important are the three octets (rwx, r-x, r-x) at the begin of each file in this view:

The first octet are the permissions of the file owner > the first pi
The second octet are the permissions of the group where the file belongs to > the second pi
The last octet are the permissions for everyone else

You can with this very easy manage permissions to files for many users.

How easy is it in real life?

pi@raspberrypi:~ $ mkdir Documents/Example
pi@raspberrypi:~ $ cd Documents/Example
pi@raspberrypi:~/Documents/ExampleDir $ touch example_file
pi@raspberrypi:~/Documents/ExampleDir $ ls -l
total 0
-rw-r--r-- 1 pi pi 0 Aug 12 14:03 example_file
pi@raspberrypi:~/Documents/ExampleDir $ ▮

Now we can use the command chmod with u (user) or g (group) or o (other) (or a combination of them) + or - and a combination of r, w and x (only one of every character).

For example I as an owner want to have the right to r - read, w write and x execute this file (I know this doesn't make so much sense - if it was a directory this would have more sense).

To get the rights one command is all I need:

pi@raspberrypi:~/Documents/ExampleDir $ chmod u+x example_file
pi@raspberrypi:~/Documents/ExampleDir $ ls -l
total 0
-rwxr--r-- 1 pi pi 0 Aug 12 14:03 example_file
pi@raspberrypi:~/Documents/ExampleDir $ ▮

And because this is a secret file nobody should be able to read it besides me:

pi@raspberrypi:~/Documents/ExampleDir $ chmod go-r example_file
pi@raspberrypi:~/Documents/ExampleDir $ ls -l
total 0
-rwx------ 1 pi pi 0 Aug 12 14:03 example_file
pi@raspberrypi:~/Documents/ExampleDir $ ▮

Now I recognized that my file isn't that secret and that even others should be able to read and edit it:

pi@raspberrypi:~/Documents/ExampleDir $ chmod go+rw example_file
pi@raspberrypi:~/Documents/ExampleDir $ ls -l
total 0
-rwxrw-rw- 1 pi pi 0 Aug 12 14:03 example_file
pi@raspberrypi:~/Documents/ExampleDir $ ▮

See - very simple, even over the console.

Add groups and add user to groups

Now we just need to know how we can add users to groups and heck even create them in the first place

Add a group

Create a user group:

sudo addgroup <groupname>

Yay. That was it. Ready. Go on.

Example:

pi@raspberrypi:~ $ sudo addgroup newgroup
Adding group `newgroup' (GID 1004) ...
Done.
pi@raspberrypi:~ $ ▮

Add user to a group

To add an user to a group isn't such difficult as you think once you read the manual page of usermod:

Just add the command options -a for append and -G for group and you're set:

sudo usermod -a -G <groupname> <username>

Example:

pi@raspberrypi:~ $ sudo usermod -a -G newgroup newusername
pi@raspberrypi:~ $ ▮

View all the users in a group

Wit the following command you will get a list off all the users in a group:

pi@raspberrypi:~ $ grep <groupname> /etc/group

That means for our example:

pi@raspberrypi:~ $ grep newgroup /etc/group
newgroup:x:1004:newusername
pi@raspberrypi:~ $ ▮

Too view all groups on your system you can also use the command getnet group

With the command grep (globally search a regular expression and print - wikipedia) you can search this list and output only the lines where the following string is contained.

Through this you can use also the command getent group | grep <groupname> to get all users of a group:

pi@raspberrypi:~ $ getent group | grep newgroup
newgroup:x:1004:newusername
pi@raspberrypi:~ $ ▮

Remove user and groups

Ok, now I have 20 users and 5 groups, but I think I can delete some of them:

Remove a user

(Source: cyberciti)

Very simple: userdel + -r + <username>

This will not only remove the user but also delete it's local home directory (-r).

So let's delete our user newusername:

pi@raspberrypi:~ $ sudo userdel -r newusername
userdel: newusername mail spool (/var/mail/newusername) not found
pi@raspberrypi:~ $ grep newgroup /etc/group
newgroup:x:1004:
pi@raspberrypi:~ $ ▮

Lock the account before you finally delete it

If you don't want to delete the account, only lock them (for some time or as a test if the account is still be used) use these commands.

pi@raspberrypi:~ $ sudo passwd -l <username>

Instead of instantly locking the account you can set a specific time when the account will be locked:

pi@raspberrypi:~ $ sudo usermod --expiredate 1 <username>

(Number in this format: YYYY-MM-DD)

If an account is locked the user will get a message at login that the account expired and he should search for the admin.

Remove a group

Probably this is no surprise but the command to remove groups is delgroup:

So now we have an empty example group. Let's remove it too:

pi@raspberrypi:~ $ sudo groupdel newgroup
pi@raspberrypi:~ $ grep newgroup /etc/group
pi@raspberrypi:~ $ ▮

So you now can also manage users on any Linux system via command line. Nice.

Bonus: Get free/used storage

Probably you encountered the problem, that you don't know where storage is used and how much storage is used.

General storage overview

pi@raspberrypi:~ $ df

With this command you get the amount of available and used space on your Micro-SD card.

With the parameter: -BM or -BG, ... you can even change the block size (Megabyte, Gigabyte, ...):

pi@raspberrypi:~ $ df -BG

Current directory storage overview

All files on their own

You hopefully know that you get the data about all the files over the command:

pi@raspberrypi:~ $ ls -al

All files together

To get the size of all files in your current directory use the command:

pi@raspberrypi:~ $ du -sh

or if you want to know the size of another directory use this:

pi@raspberrypi:~ $ du -sh Path/to/another/directory

Bonus: Use Lazarus with IDE

Lazarus is a great programming language that I used some time back in school. It's somewhat like Delphi but just search the internet, if you are interested.

Install IDE

Really easy. You just need this:

pi@raspberrypi:~ $ sudo apt-get update && sudo apt-get upgrade
pi@raspberrypi:~ $ sudo apt-get install fpc
pi@raspberrypi:~ $ sudo apt-get install lazarus

After that start it over the start menu or over the command startlazarus.

Bonus: Mount external drive (with the console)

This isn't exactly that simple like you're used to...

Attention: If you use the GUI and just want to copy data you don't need this!

Raspbian automatically detects new USB drives and mounts them if you follow the dialog.

If not or you want to use the console follow this tutorial:

Let's put in our USB-Drive and check if it blinks.

If it does blink:

Find out if it is "mounted"

Therefore use this command:

pi@raspberrypi:~ $ dmesg | tail -n 20

dmesg will print the kernel ring buffer... and with tail we take us the last 10 lines of this buffer. Or better with -n 20 we take the last twenty lines of the buffer:

...
[984210.277928] usb 1-1.2: new high-speed USB device number 4 using dwc_otg
[984210.408873] usb 1-1.2: New USB device found, idVendor=8644, idProduct=8003
[984210.408887] usb 1-1.2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[984210.408896] usb 1-1.2: Product: USB Flash Disk
[984210.408903] usb 1-1.2: Manufacturer: General
[984210.408911] usb 1-1.2: SerialNumber: 02303500000002D1
[984210.409908] usb-storage 1-1.2:1.0: USB Mass Storage device detected
[984210.410700] scsi host0: usb-storage 1-1.2:1.0
[984211.478865] scsi 0:0:0:0: Direct-Access     General  USB Flash Disk   1.00 PQ: 0 ANSI: 2
[984211.480459] sd 0:0:0:0: [sda] 3913728 512-byte logical blocks: (2.00 GB/1.87 GiB)
[984211.480809] sd 0:0:0:0: [sda] Write Protect is off
[984211.480823] sd 0:0:0:0: [sda] Mode Sense: 03 00 00 00
[984211.481140] sd 0:0:0:0: [sda] No Caching mode page found
[984211.481151] sd 0:0:0:0: [sda] Assuming drive cache: write through
[984211.484964]  sda: sda1
[984211.490303] sd 0:0:0:0: [sda] Attached SCSI removable disk
[984211.506485] sd 0:0:0:0: Attached scsi generic sg0 type 0

So we see it's there, but we want to know the name of it. Let's try this command:

pi@raspberrypi:~ $ sudo fdisk -l
...
Device         Boot Start      End  Sectors  Size Id Type
/dev/mmcblk0p1       8192    93596    85405 41.7M  c W95 FAT32 (LBA)
/dev/mmcblk0p2      94208 62333951 62239744 29.7G 83 Linux

Disk /dev/sda: 1.9 GiB, 2003828736 bytes, 3913728 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0xd8fca99d

Device     Boot Start     End Sectors  Size Id Type
/dev/sda1  *      128 3913727 3913600  1.9G  e W95 FAT16 (LBA)

Now I can see that my 2GB USB stick with the name /dev/sda1 seems to be mounted, but how do I get access to it's file system?

Mount the external drive to the file system

To get access we need to mount the drive to the file system.

To do this we first decide where we wanna mount it. I thought I take the empty media directory:

pi@raspberrypi:~ $ cd ../../../media
pi@raspberrypi:/media $ ▮

There we create a directory - named however we want. I went with usb:

pi@raspberrypi:/media $ sudo mkdir usb
pi@raspberrypi:/media $ ▮

Now the first step get's it part. We need to know the name of the USB device on the system. In my case (you can read the logs) this is /dev/sda1.

Now all we have to do is:

pi@raspberrypi:/media $ sudo mount /dev/sda1 usb

And we mounted the drive with the name /dev/sda1 in the directory usb.

Just try it out and hit:

pi@raspberrypi:/media $ ls -la usb

Name		Name	Last commit message	Last commit date
Latest commit History 79 Commits
linuxdemo		linuxdemo
pictures/gpio		pictures/gpio
scripts		scripts
.gitignore		.gitignore
CAMERA.md		CAMERA.md
CODE_OF_CONDUCT.md		CODE_OF_CONDUCT.md
GPIO.md		GPIO.md
LICENSE		LICENSE
README.md		README.md

License

AnonymerNiklasistanonym/RaspiForBeginners

Folders and files

Latest commit

History

Repository files navigation

RaspiForBeginners

0. Other cool things

0.1 How to connect and use a camera with Python

0.2 How to connect and use GPIO pins

1. Get the hardware

2. Setup an OS

3. First start

4. Security and network and more

Security

Change the default password (!!!)

Graphical User Interface

Console

Deactivate the auto login at boot

Network

Resolution

Resolution - Graphical User Interface

Resolution - Console

5. Connect it

Remote desktop connection

Update 18. August 2017

XRDP (Works fine with Windows)

XRDP method for Android

SSH (terminal) connection

ConnectBot (Android, Open Source)

PuTTY (Windows, Open Source)

File manager connection (SFTP over SSH)

Filezilla (Windows, Open Source)

Swish (Windows, Open Source)

Solid Explorer File Manager (Android, Trial free)

6. Welcome to the console :)

Introduction

Start the console

Shortcuts

Commands

Text output command ("Hello world")

echo

File system commands

ls

cd

Create/Edit/Delete/View files

mkdir

touch

nano

cat

Create short files with cat in the Terminal

rm

rmdir

Find out more about commands

man

Command history tricks

history

!!

Learn more commands and shortcuts

Commands advanced

Queue commands

Search CLI output

Search a text file

But there is even more besides cat file | grep 'word'

7. Install additional software/programs

The operating system

The kernel

Linux distributions and Windows

How to install these... packages

Example: Lets install Firefox

Example: Lets install cowsay

Example: Lets watch a movie

What can I do when a new version of my installed software gets released

8. Program on it

Scripting Languages

Bash

Python

Python 2 and 3

PHP

Ruby

`echo`

`ls`

`cd`

`mkdir`

`touch`

`nano`

`cat`

Create short files with `cat` in the Terminal

`rm`

`rmdir`

`man`

`history`

`!!`

But there is even more besides `cat file | grep 'word'`

Enable SFTP in html directory (`chmod`)

10. Automated tasks scheduler (`cron`)

Create a script for a `cron` job

Create a `cron` job

Packages