Simple tool to automate running commands in parallell using tmux. Acts like clusterssh when invoked like this:"tmulti.sh ssh host1 host2 ..."

tmulti.sh

#!/bin/bash
#
# Author: Morten Johansen <morten@cerum.no>
# License: CC BY-SA 3.0 http://creativecommons.org/licenses/by-sa/3.0/
# Usage: tmulti <cmd> <arg1> ...
# Will create one pane in tmux for each arg, and execute "<cmd> <argN>" in each pane, in parallel
# Example: tmulti ssh user@node{1..4}.example.com
#

BNAME=$(basename ${0})
SESSION=$BNAME-$RANDOM
CMD=$1


if [ -z ${TMUX} ]
then
    # Not inside tmux from before
    tmux new-session -d -s "$SESSION" "$CMD $2"
    tmux select-window -t "$SESSION:0"
else
    # Already inside tmux.
    tmux send-keys C-c
    tmux send-keys "$CMD $2" C-m
fi

tmux rename-window "$BNAME $CMD"

for i in "${@:3}"
do
    tmux split-window -h "$CMD $i"
    tmux select-layout tiled
done

tmux set-window-option synchronize-panes on

if [ -z ${TMUX} ]
then
    tmux attach-session -t "$SESSION"
fi