黑猴子的家：xcall.sh

#!/bin/bash

user=`whoami`

if [[ -n $1 ]]; then
    cmd=$*
else
    cmd=jps
fi

for((host=102; host<=104; host++)); do
    echo -e "\n---$user@hadoop$host---"
    ssh $user@hadoop$host "source /etc/profile; $cmd"
done