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I am the fool (linux install)
(discuss.tchncs.de)
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What’s the easy way to do this on an arch system?
Probably the easiest way to get a backup is backintime and an external disk. Although if you really care about your data you should use a 3-2-1 strategy.
I use borgbackup with borgmatic.
Backing it up to a local hdd and to a hetzter storage box.
if you still have multi boot, i would suggest using clonezilla to put images of everything onto an external HD.
if you just have linux, the easiest way is to keep an installation medium, get a big USB stick (or external HD) and tar everything on to it. tar has a test mode, a diff mode and incremental mode, so you can make sure it has everything. you can also exclude things like snaps (they appear twice when installed, so no need to backup both). to restore, you would use the installation medium to fix partitions if necessary, then extract everything and maybe chroot into it and fix the boot loader.