Re: yast2 backup
The Yast backup is a good idea in theory: you don't need to backup everything that's part of the openSUSE installation (and official updates) but only that which was altered since installation, so really it achieves much the same as caf4926's strategy. Unfortunately, it's all theory as I never managed to get it to work: it pretends to make a backup and then doesn't, with no error messages.
Using Back in Time now.
Desk: openSUSE 12.3, KDE4.10.2, Intel i3, 8Gb, Kingston 64Gb SSD, 2 SATA, dual monitors.
Lap: Toshiba Satellite L300, openSUSE 12.3, KDE4.10.2, Intel C2D 2.1GHz CPU, 4Gb, Intel X3100 video.