shell 批量更改密码的脚本

一.生产成ssh秘钥对：

#!/bin/bash

for ip in iplist.txt

do

ssh-copy-id -i  ~/.ssh/id_rsa.pub  $ip:/home

done

二.运行下面的脚本：

#!/bin/bash 

#filename: root_pwd.sh 

#Environment: Centos

 #.... 

ip_list=`cat /home/shell/ip_list.txt` 

#................----------------------- 

#随机生成密码

function pwdgen { 

    strUp="ABCDEFGHIJKLMNOPQRSTUVWXYZ" 

    strLow="abcdefghijklmnopqrstuvwxyz" 

    strNum="0123456789" 

    passLen="8" 

    while [ "${#pass}" -le "$passLen" ] 

    do 

        passUp="${strUp:$(($RANDOM%${#strUp})):1}" 

        passLow="${strLow:$(($RANDOM%${#strLow})):1}" 

        passNum="${strNum:$(($RANDOM%${#strNum})):1}" 

        pass="$pass$passUp$passLow$passNum" 

    done 

    echo ${pass:0:$passLen} 

} 

#.........------------------------------------- 

#更改root密码

read -p "root用户输入a生成密码输入b输入密码: " fangshi 

if [ $fangshi = a ];then 

TMP_PWD=`pwdgen` 

elif [ $fangshi = b ]; then 

read -p "..........: " TMP_PWD 

else 

echo " .... " 

exit 

fi 

#.......----------------------------------------- 

for IP in $ip_list; do 

echo   $TMP_PWD > TMP_PWD.txt 

ssh  $IP passwd root --stdin < TMP_PWD.txt 

echo "$(date +%Y-%m-%d).log..!" 

#修改普通用户密码

read -p "普通用户输入a生成密码输入b输入密码: " fangshi

if [ $fangshi = a ];then

TMP_PWD=`pwdgen`

elif [ $fangshi = b ]; then

read -p "..........: " TMP_PWD

else

echo " .... " 

exit

  fi

 #.......----------------------------------------- 

for IP in $ip_list; do

echo   $TMP_PWD > pu.txt

ssh  $IP passwd baocheng --stdin < pu.txt

echo "$(date +%Y-%m-%d).log..!" 

  done

done