Linux system bulk Modify user Password

Scripting Purpose: bulk modification of Linux system user passwords

Condition: The user who must be modified is root because only root has permission to use the passwd command

Description: the IP, user, password, port information is written to the Old_info file, the script reads the corresponding information from this file, using the expect-free interactive landing system. Modify the randomly generated 8-bit password to the root user's new password. Then save the new password to the Net_info file.

# cat old_info #     ip      user    passwd    port#----------------------- -------------------------192.168.18.217  root    n8wx3mu%      22192.168.18.218  root    c87; Znnl     22 

# cat change_pass.sh#!/bin/bashold_info=~/old_infonew_info=~/new_infofor ip in  ' awk   '/^[^#]/{print $1} '   $OLD _info ';  do    user= ' awk -v i= $IP   ' {if (i==$1) print $2} '   $OLD _info '     pass= ' awk -v i= $IP   ' {if (i==$1) print $3} '   $OLD _info '     port= ' awk -v i= $IP   ' {if (i==$1) print $4} '   $OLD _info '     new_pass= ' mkpasswd -l 8 '      echo  "$IP     $USER     $NEW _pass         $PORT " >>  $NEW _infoexpect -c "     spawn ssh -p$ Port [email protected] $IP     set timeout 2     Expect {        \ "(yes/no) \"  {send \ "yes\r\"; exp_ Continue}    &nbSp;   \ "Password:\"  {send \ "$PASS \r\";exp_continue}         \ "[email protected]*\"  {send \ "echo \ ' $NEW _pass\ '  |passwd -- stdin  $USER \r exit\r\ "; exp_continue}        #\" [email  Protected]*\ "  {send \" df -h\r exit\r\ "; exp_continue}    }" done

# cat New_info 192.168.18.217 root n8wx3mu% 22192.168.18.218 root c87; ZNNL 22

This article is from the "Li Zhenliang Technology Blog" blog, make sure to keep this source http://lizhenliang.blog.51cto.com/7876557/1674791

Linux system bulk Modify user Password