Control multiple ssh connections using Tmux. It creates a new tmux window with a pane ssh'd to each listed host and syncronizes the panes so input is sent to each pane. Inspired by csshx (https://code.google.com/p/csshx/).

cssht

#!/bin/bash

tmux_ssh () {
  tmux send-keys 'ssh ' $1 'C-m'
}

split_and_ssh () {
  tmux split-window -h
  tmux_ssh $host
}

tmux new-window
tmux_ssh $1

for host in ${@:2}; do
  split_and_ssh $host
done

tmux select-layout tiled
tmux setw synchronize-panes on

Usage:

$ cssht host1 host2 host3 etc.