Linux lock unlock user account

----------------------------script.sh---------------

#! /bin/sh
### BEGIN Script INFO
#
# Befor Usering it please check the user name
# file /root/users.txt
#

case "$1" in
lock)
data=`cat /root/users.txt`
for n in $data; do
usermod -L $n && echo "$n is locked"
done
;;
unlock)
data=`cat /root/users.txt`
for n in $data; do
usermod -U $n && echo "$n is unlocked"
done
;;
*)
echo "Usage: $0 {lock|unlock}" >&2
exit 1
;;
esac
exit 0

------------------
users.txt contains users id which have to be locked or unlocked

----------------------------run that script------------

/.script.sh lock

/.script.sh unlock