[NTLUG:Discuss] Leopard's Time Machine: backup/restore - Does Linux have something similar?

[Stan Gatchel]

My brother recently purchased a new MacPro quad-core (two Dual-Core 
Intel Xeons) with Leopard! He was showing me Time Machine over the 
Thanksgiving weekend and it seems really nice.

http://arstechnica.com/reviews/os/mac-os-x-10-5.ars/14

He has 2 drives: the 350 GB is the main drive and the 500GB is the the 
drive used by Time Machine. Backups are automated hourly, daily, monthly 
to this second drive. Recovery is a snap via a really slick GUI frontend.

I was just wondering what we have in the Linux world that comes closest.

Thanks,

Stan