linux下批量修改密码

#!/bin/sh
#****************************************************************#
# ScriptName: m_passwd.sh
# Author:
# Create Date: 2011-06-12
# Modify Author:
# Modify Date: 2011-06-12
# Function:Modify the host password.
#***************************************************************#

declare -r pw=./config/m_passwd.txt  \\需要修改的密码写在该文件中
declare -r host_list=./config/c_list.txt  \\需要修改机器的列表
declare -r log=./log/m_passwd.log
declare -r list=$(cat $host_list | grep -v ^#)

if [ -s $pw ] && [ -s $host_list ];then
    for i in $list
    do
        date >> $log
        echo "$i" >> $log
        echo "Change the password $i"
        ssh -T -o ConnectTimeout=8 root@$i passwd root --stdin < $pw >> $log
        echo "=================" >> $log
    done
    echo "-----------------------------------"
    echo "Complete the password change! ^ 0 ^"
else
    echo "No configuration information."
fi

前提:ssh通道已经打通。