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Creating an Ad-Hoc Network On Raspberry pi (raspbian)

I will refine this later so you can have a virtual network, that way you dont need the ugly ethernet setup.

Requirements

You need the following to do this If you want to have the pi's connected to the internet. You can use SSH over the ad-hoc network (which was suprising).

  1. An ethernet cable for every raspberry pi you have
  2. An n + 2 port ethernet switch (for n pi's, 1 to your laptop, 1 to the router/internet)
  3. A laptop/desktop hub station for control (You can also use one of your Pi's for the control node)

Setup

Follow these steps

  1. Edit /etc/network/interfaces as root
  2. Add the following into interfaces at the bottom of the file 
    auto lo
iface lo inet loopback

iface eth0 inet manual

auto wlan0
iface wlan0 inet static
	address 192.168.X.X #Replace these X's with whatever you want
	netmask 255.255.255.0
	wireless-channel 1
	wireless-essid 439AdHoc
	wireless-mode ad-hoc
  3. restart your device. sudo shutdown -r now works just fine. This will disable eth0 (for some really weird reason). You are now on an ad-hoc network. But as mentioned above, the device is now acting strange on startup. The next two commands fix that
  4. run sudo crontab -e, add the command ip link set <eth0> up, replace eth0 with whatever your ethernet port
  5. edit /etc/rc.local, insert dhclient -v eth0

This will re-enable eth0 so you can connect via eth

If you are using a git repo and want to pull, you have two options.

  1. Pull from the internet (Requires some ethernet connection)
  2. Host a local gitserver (I havent gotten this to work yet, but google git serve)