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Bash script to copy latest files from your Ubuntu server to remote SFTP server

Details:

Ubuntu Server

  • Local Directory: /sftpusers/chroot/sftp-dev-dir/bills

Remote SFTP Server

  • Server IP: 47.118.76.93
  • Custom Port: 3333
  • Username: taj_uat
  • Password: t@J@Mba$@$fTp786
  • Remote Directory: /interface/bills/IN

This script uses the sftp command to connect to the remote server and upload the specified files from a local directory to a remote directory. It also uses the sftp batch mode to automate the process without requiring user interaction.

In this example, password of SFTP folder (t@J@Mba$@$fTp786) contains special character such as "$". The shell is interpreting the "$" characters in the password string as the start of a variable name. You can try escaping the special characters with a backslash (\).

#!/bin/bash

HOST='47.118.76.93'
PORT='3333'
USER='taj_uat'
PASSWORD='t@J@Mba\$@\$fTp786'
REMOTE_DIR='/interface/bills/IN'
LOCAL_DIR='/sftpusers/chroot/sftp-dev-dir/bills'

# Get the 5 latest files in the local directory
latest_files=$(ls -tp $LOCAL_DIR | grep -v / | head -5)

# Copy each of the 5 latest files to the remote directory
for file in $latest_files
do
  expect << EOF
    spawn sftp -oPort=$PORT $USER@$HOST
    expect "password:"
    send "$PASSWORD\r"
    expect "sftp>"
    send "lcd $LOCAL_DIR\r"
    expect "sftp>"
    send "cd $REMOTE_DIR\r"
    expect "sftp>"
    send "put $file\r"
    expect "sftp>"
    send "bye\r"
EOF
done

To connect to an SFTP server using a non-standard port (such as port 3333), you can add the -P option to the sftp command, followed by the port number.

Save the script to a file (e.g., sftp_script.sh) and make it executable by running chmod +x sftp_script.sh. Finally, run the script by typing ./sftp_script.sh in your terminal.

This script first gets the 5 latest files in the local directory using the ls and grep commands, and then loops through each file and copies it to the remote directory using the expect script.

Note that this script uses the sftp command-line utility, which may not be installed by default on your Ubuntu server. You can install it by running sudo apt-get install openssh-client if it is not already installed.

You can try running the script with the -x option to enable debugging and see where the error occurs:

bash -x your_script.sh

This will print each command as it is executed, along with any variables that are expanded, which may help you identify the syntax error.