#!/bin/bash help() {  cat << HELP    --------------HELP------------------------    This shell script can copy file to many computers.    Useage:        copytoall filename(full path form /home) targetpathfrom/ username ip1 ip2 ip3....    Example:        copytoall /home/casliyang/Hadoop-2.2.0/etc/hadoop/core-site.xml /home/casliyang/hadoop-2.2.0/etc/hadoop/ casliyang 192.168.0.5 192.168.0.6 192.168.0.7 192.168.0.8    ------------------------------------------ HELP  exit 0 } currentdate=$(date +%Y-%m) echo $currentdate " execute copytoall" if [ $1 = "-h" ] ; then     help    exit 0 fi file=$1 shift targetpath=$1 shift user=$1 shift tempip=0 if [ -f $file ] ; then    while [ $# -gt 0 ] ; do        tempip=$1        shift        scp $file ${user}@${tempip}:${targetpath}    doneelse    echo "wrong file!"    exit 0 fi