Script to create hundreds of users in one go.

100users.sh

#!/bin/bash

echo This script requires super user permissions. Press \'y\' if you are running as super user.
read ch
count=$1

if [ $ch = "y" ] || [ $ch = "Y" ]
then
  echo in if now
  while [ $count -ne 0 ]
  do
    echo Adding User $count
    useradd user$count
    echo userpwd$count | passwd --stdin user$count
    let "count=$count-1"
  done
else
  echo Please run the script as super user.
fi