Running a Bash script over ssh

Question

I\'m trying to write a Bash script that will SSH into a machine and create a directory. The long-term goal is a bit more complicated, but for now I\'m starting simple. Howev

Answer 1

How to run a local script over SSH

Synopsis:

Script execution over SSH without copying script file. You need a simple SSH connexion and a local script.

Code:

#!/bin/sh
print_usage() {
        echo -e "`basename $0` ssh_connexion local_script"
        echo -e "Remote executes local_script on ssh server"
        echo -e "For convinient use, use ssh public key for remote connexion"
        exit 0
}

[ $# -eq "2" ] && [ $1 != "-h" ] && [ $1 != "--help" ] || print_usage

INTERPRETER=$(head -n 1 $2 | sed -e 's/#!//')

cat $2 | grep -v "#" | ssh -t $1 $INTERPRETER

Examples:

• ssh-remote-exec root@server1 myLocalScript.sh #for Bash
• ssh-remote-exec root@server1 myLocalScript.py #for Python
• ssh-remote-exec root@server1 myLocalScript.pl #for Perl
• ssh-remote-exec root@server1 myLocalScript.rb #for Ruby

Step by step explanations

This script performs this operations: 1° catches first line #! to get interpreter (i.e: Perl, Python, Ruby, Bash interpreter), 2° starts remote interpeter over SSH, 3° send all the script body over SSH.

Local Script:

Local script must start with #!/path/to/interpreter - #!/bin/sh for Bash script - #!/usr/bin/perl for Perl script - #!/usr/bin/python for Python script - #!/usr/bin/ruby for Ruby script

This script is not based on local script extension but on #! information.