Mussh is a shell script that allows you to execute a command or script over ssh on multiple hosts with one command. When possible mussh will use ssh-agent and RSA/DSA keys to minimize the need to enter your password more than once.
amazing tool，very useful to manage many hosts~
MuSSH is incredible! Is a single BASH script, so there are no crazy language dependencies, it efficiently uses ssh-agent to reduce multiple connects, and runs full scripts very easily. Short of a full ControlTier deployment, nothing comes close to the elegance of MuSSH.