[General] Parallel SSH execution and a single shell to control them all

[Mohammed Al-Essa]

Many people use SSH to log in to remote machines, copy files around,
and perform general system administration. If you want to increase
your productivity with SSH, you can try a tool that lets you run
commands on more than one remote machine at the same time. Parallel
ssh, Cluster SSH, and ClusterIt let you specify commands in a single
terminal window and send them to a collection of remote machines where
they can be executed.

http://blog.q8lug.org/2008/10/31/parallel-ssh-execution-and-a-single-shell-to-control-them-all/