Add multiple user in linux

http://www.cyberciti.biz/tips/linux-how-to-create-multiple-users-accounts-in-batch.html

for i in `seq 1 30`;
do
echo -n “group$i:group$i:”
echo -n $i | awk ‘{printf 1;printf “%03d”, $1;}’
echo :506:Student user:/home/user$i:/bin/bash

done