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% 22

192.168.18.218 root c87; ZNNL 22

# Cat Change_pass.sh

#!/bin/bash

Old_info=~/old_info

New_info=~/new_info

For IP in ' awk '/^[^#]/{print $ ' $OLD _info '; Do

User= ' awk-v i= $IP ' {if (i==$1) print $ ' $OLD _info '

Pass= ' awk-v i= $IP ' {if (i==$1) print $} ' $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 _info

Expect-c "

Spawn Ssh-p$port [email protected] $IP

Set Timeout 2

Expect {

\ "(yes/no) \" {Send \ "yes\r\"; Exp_continue}

\ "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% 22

192.168.18.218 root c87; ZNNL 22

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Linux system bulk Modify user Password