ClusterSSH is a tool for making the same change on multiple servers at the same
time. The 'cssh' command opens an administration console and an xterm to all
specified hosts. Any text typed into the administration console is replicated
to all windows. All windows may also be typed into directly.

This tool is intended for (but not limited to) cluster administration where the
same configuration or commands must be run on each node within the cluster.
Performing these commands all at once via this tool ensures all nodes are kept
in sync.