First of all create two files one contains username and other
passwords. here i'm using file users as username file and file pass as
password file and script is:
#!/bin/bash
arr=(`cut -f1 users`)
for i in `cat pass`
do
useradd ${arr[$x]};
echo $i|passwd --stdin ${arr[$x]};
x=$[$x+1];
done
enjoy creating users in one go!!
Naresh