user.sh

#!/bin/bash
n=1
while [ $n -le 5 ]
do
        n=$(( $n + 1 ))
        user=user$n
        userdel -r $user
        echo "$user was removed from system"
        useradd $user
        echo "$user" | passwd --stdin $user > /dev/null
        echo "$user is added to system"
done