Simple shell script that wraps tmux to simulate clusterssh behaviour, while not needing X and having all the advantages of tmux. Run as: ./uberssh.sh my_session_name host1 host2 host3To toggle between input synchronization, use "ctrl+b u".

uberssh.sh

#!/bin/bash
TMUX_PATH="/usr/bin/tmux"
SESS_NAME="$1"
shift

HOSTS="$*"
let ctr=0
for h in $HOSTS; do
    if [ $ctr -eq 0 ]; then
        $TMUX_PATH new-session -d -s $SESS_NAME "ssh $h"
    else
        $TMUX_PATH splitw -t $SESS_NAME:0 "ssh $h"
        $TMUX_PATH select-layout -t $SESS_NAME:0 tiled
    fi
    let ctr=ctr+1
done
$TMUX_PATH set-window-option -t $SESS_NAME:0 synchronize-panes on
$TMUX_PATH select-pane -t $SESS_NAME:0
$TMUX_PATH bind-key u set-window-option synchronize-panes
$TMUX_PATH attach -t $SESS_NAME