Linux 普通用户自动修改密码

在大量服务器运维中,维护服务器账号就让人头痛，对账号密码策略要求,现写了一个shell脚本来完成账号密码的修改，当然这个不是最好的方法，只是在没有其它辅助服务时使用,最好还是使用账户统一管理服务来维护.

 #!/bin/bash
 #
 #change passwd
 #function passwd user
 function remote_spawn()
 {
 /usr/bin/expect << EOF
 set timeout
 spawn ssh  -o "StrictHostKeyChecking no" $USER_NAME@$IP "passwd"
 expect "*UNIX password:"
 send "$PATROL\r"
 set timout
 expect {
     "*$" {send "exit 1\r"}
     "New password:" {send "$PASSWD\r";expect "Retype new password"; send "$PASSWD\r";expect eof}
 }
 EOF
 }

 function local_spawn()
 {
 /usr/bin/expect << EOF
 set timeout
 spawn passwd
 expect "*UNIX password:"
 send "$PATROL\r"
 set timout
 expect {
     "*$" {send "exit 1\r"}
     "New password:" {send "$PASSWD\r";expect "Retype new password"; send "$PASSWD\r";expect eof}
 }
 EOF
 }

 PATROL="U2WNxrnxGsg="
 USER_NAME='dongjia'
 IP='127.0.0.1'
 SIZE=`cat /etc/pam.d/system-auth |grep -v ^[[:space:]]*# |grep -o remember=[-]* |grep -o -m1 [-]*`
 LEN=`expr $SIZE + `
 echo "remeber is $SIZE"
 #change patrol passwd 

 #system version
 if [ `uname -r` == '3.10.0-123.el7.x86_64' ]
 then
     echo "----------system version redhat server 7----------"
 else
     echo "----------system version no redhat server 7-------"
     exit
 fi

 if [ $LEN -eq  ];then
     LEN=`expr $LEN + `
 fi
 #user passwd change count
 for i in $(seq  $LEN)
 do
     if [ $i -eq $LEN ]
     then
         echo "----------------------------------------------"
         echo "passwd restore acton"
         PASSWD="U2WNxrnxGsg="
         local_spawn > passwd.log
         grep "Authentication token manipulation error" passwd.log
                 SULT=$?
                 if [ $SULT -eq  ]
                 then
                         echo "passwd change error log"
                         exit
         fi
     else
         echo "----------------------------------------------"
         echo $i
         PASSWD=`openssl rand -base64 `
         echo $PASSWD
         local_spawn > passwd.log
         grep "Authentication token manipulation error" passwd.log
         SULT=$?
         if [ $SULT -eq  ]
         then
             echo "passwd change error log"
             exit
         fi
     fi
     PATROL=$PASSWD
 done