Use ssh on multiple servers simultaneous

If you have many servers to manage and want to perform the same tasks on each of the machine every day, then you should look at the package named clusterssh.

Install the clusterssh package

apt-get install clusterssh

Perform the same command on the three servers server1 server2 and server3

cssh server1 server2 server3

This opens three ssh consoles, one for each server, and a little console for you to type your commands.