Cheaper backup mechnism for a server

[Wojciech Puchar]

>
> A general question pls excuse me
>
> can any body suggest a backup mechanism for a server machine , which has a 
> web portal , email server ,PgSQL database 4GB size , DNS server, Mailman , 
> and a mediawiki applications running in a single machine .
>
> Can you suggest good solutions , for the server Backup mechanism    so that I 
> can restore all the data just before the crashing moment .

just before is too much. but try rsync