off topic: backup

[Wagner]

Good Afternoon:   I've got qmail+vpopmail+qmailadmin+sqwebmail+vqadmin running on my linux, and i want to start to make backups of my vpopmail directory (where the users account are).   I'd like to know how to do it and if my machine goes down, can i use this backup to put in another machine to restore the users's messages?   I don't want to lose the users messages !   Thank you very much: Wagner Garcia Campagner