How can I automate running commands remotely over SSH to multiple servers in parallel?

Question

I\'ve searched around a bit for similar questions, but other than running one command or perhaps a few command with items such as:

ssh user@host -t sudo su -         


        

Answer 1

You can pipe the local script to the remote server and execute it with one command:

ssh -t user@host 'sh' < path_to_script

This can be further automated by using public key authentication and wrapping with scripts to perform parallel execution.