Expire/delete inactive linux user accounts

linux_user_expire.sh

#!/bin/sh
#
# Expire and delete inactive linux users
#

# check this before running!
exclude_users="keepme|metoo|daemon|adm|lp|sync|shutdown|halt|mail|news|uucp|operator|man|postmaster|smmsp|portage|nobody|sshd|cron|ntp|messagebus|mysql|apache|haldaemon|ftp|postfix|dhcp|ntop|fetchmail|squid|hsqldb|tomcat"

remove_period="548" # 18 months

main()
{
	lastlog -b ${remove_period} | egrep -v ${exclude_users} | while read line
	do
		set $line
		user_id=${1}

		echo "Remove ${user_id}"

		/usr/sbin/userdel -f -r ${user_id}
	done
}

main

exit 0