[Samba] Tool to change password for samba users

[Lunix1618]

Volker Lendecke wrote:
> That's built into Windows: Type ctrl-alt-del, "change
> password", type in either your domain name or the Samba
> server's name into the "domain" field, old password, new
> password, and you're done.
>
>   
Thanks, another question:
How to make samba password sync. with Unix account? my samba server is 
3.0.28 running on CentOS 5.2
regards.