Script to update user password in batch mode using pwgen and chpasswd
Posted in Security
#!/bin/bash # Script to update user password in batch mode # You must be a root user to use this script # ------------------------------------------------------------------------- # Copyright (c) 2005 nixCraft project # This script is licensed under GNU GPL version 2.0 or above # ------------------------------------------------------------------------- # This script is part of nixCraft shell script collection (NSSC) # Visit http://bash.cyberciti.biz/ for more information. # ---------------------------------------------------------------------- # /root is good place to store clear text password FILE="/root/batch.passwd" # get all non-root user account # By default on most linux non-root uid starts # from 1000 USERS=$(awk -F: '{ if ( $3 >1000 ) print $1}' /etc/passwd) # create file with random password echo "Generating file, please wait..." # overwrite file >$FILE for u in $USERS do p=$(pwgen -1 -n 8) # create random password echo "$u:$p" >> $FILE # save USERNAME:PASSWORD pair done echo "" echo "Random password and username list stored in $FILE file" echo "Review $FILE file, once satisfied execute command: " echo "chpasswd < $FILE" # Uncomment following line if you want immediately update all users password, # be careful with this option, it is recommended that you review $FILE first # chpasswd < $FILE
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Tags: awk command, chpasswd command, for loop, grep command, loop method, pwgen command, random password, root user, shell loops ~ Last updated on: April 10, 2008
