Programmably regenerate passwords for users (Ubuntu)

regen-password.sh

#!/bin/bash
# Usage: put list of users in "users" file. 
#        one user per line.
# Passwords will be changed and stored in "passwd.list"

rm -f passwd.list
for user in `cat users`
do
        password=`echo "sdf982ci237986ahah:$user" | sha1sum | cut -c1-16`
        echo $user
        echo $password
        echo "$user:$password" | chpasswd
        echo "Linux changed"
        echo -e "$password\n$password" | smbpasswd -a -s $user
        echo "Samba changed"
        echo "$user $password" >> passwd.list
done