CODEWITHSUNDEEP
linuxbashshell
CuriousMind
CuriousMind

Reputation: 15808

Bash: how to run a script remotely

I have a script (say run.py) and I want to scp that to a remote machine (say 10.1.100.100), cd into a directory in that remote machine, and execute run.py in that directory.

How do I wrap the above procedure in one single bash script? I don't know how to let bash execute commands remotely in another machine.

Hopefully I can see that stdout of run.py in my terminal. But if I can only redirect it, that's fine as well.

Upvotes: 4

Views: 5944

Answers (4)

Mr. Green
Mr. Green

Reputation: 1

Remember, that this is not a rule, that you HAVE TO cd to the requested directory.

Once you get access to the remote machine, just type a relative path to this file, without using cd:

/some_folder/./run.py

Upvotes: 0

jmrenouard
jmrenouard

Reputation: 104

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.

Upvotes: 3

pizza
pizza

Reputation: 7640

You can do it like this:

ssh -l yourid 10.1.100.100 << DONE
cd /your/dir/
./run.py
DONE

Above has been edited, I don't remember what it was like originally, if I want to do it in one single connection, I will do it this way.

ssh -l yourid 10.1.100.100 python < <(
echo "import os"
echo "os.chdir('/yourdir')"
echo "print(os.getcwd())"
cat yourscript.py
)

Upvotes: 1

jim mcnamara
jim mcnamara

Reputation: 16399

chmod +x ./run.py
scp -pq  ./run.py 10.1.100.100:'/home/myremotedirectory/run.py'
ssh 10.1.100.100     'cd /somedirectory  &&  /home/myremotedirectory/run.py'

See if that helps

Upvotes: 5

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