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

pssh may be interesting since, unlike most solutions mentioned here, the commands are run in parallel.

(For my own use, I wrote a simpler small script very similar to GavinCattell's one, it is documented here - in french).