For me it is not recording credentials with the assumption I would simply remember them later, while having every opportunity to archive them before eventually forgetting. Also, not keeping detailed enough notes & photos of exactly how my hardware is attached.
I’m actually amazed I haven’t had any costly mistakes yet considering I’m the kind of person to say “it’s just dd, what’s the worst that can happen? it’ll be fine no worries”. Since I’ve installed Arch a year ago I’ve been constantly expecting to catastrophically break something… and my system is still running, somehow. It’s very perplexing.
You do backup important data, right?
Right… sure… erm… of course I do, obviously 😅
Actually I always mean to do it but I keep forgetting… Recently I’ve resigned myself to the fact that I’ll never remembering to do it so I’ve been trying to set up an auto-sync to my NAS with rsync and inotifywait so I won’t have to ever think about backups again… But I really suck at coding so it’s not going too well 😅