Tinkering is all fun and games, until it's 4 am, your vision is blurry, and thinking straight becomes a non-option, or perhaps you just get overly confident, type something and press enter before considering the consequences of the command you're about to execute... And then all you have is a kernel panic and one thought bouncing in your head: "damn, what did I expect to happen?".
Off the top of my head I remember 2 of those. Both happened a while ago, so I don't remember all the details, unfortunately.
For the warmup, removing PAM. I was trying to convert my artix install to a regular arch without reinstalling everything. Should be kinda simple: change repos, install systemd, uninstall dinit and it's units, profit. Yet after doing just that I was left with some PAM errors... So, I Rdd-ed libpam instead of just using --overwrite. Needless to say, I had to search for live usb yet again.
And the one at least I find quite funny. After about a year of using arch I was considering myself a confident enough user, and it so happened that I wanted to install smth that was packaged for debian. A reasonable person would, perhaps, write a pkgbuild that would unpack the .deb and install it's contents properly along with all the necessary dependencies. But not me, I installed dpkg. The package refused to either work or install complaining that the version of glibc was incorrect... So, I installed glibc from Debian's repos. After a few seconds my poor PC probably spent staring in disbelief at the sheer stupidity of the meatbag behind the keyboard, I was met with a reboot, a kernel panic, and a need to find another PC to flash an archiso to a flash drive ('cause ofc I didn't have one at the time).
Anyways, what are your stories?
I have a stupid one, but far from funny.. I've been using and building computers for a very long time so I'm far from a noob, but I'm still quite cautious, bordering on paranoid, so I like to unplug all other drives when re/installing an OS just to avoid stupid mistakes. I go through the installer on the livecd, there's only one drive to choose from so I don't think much about it, select that it should erase everything, I set up the new partition structure, and start the process. After about a minute I begin wondering "why is it taking so long?", and "what is that ticking noise? SSDs shouldn't be making any sounds when written to", when I realize that I had unplugged the wrong drives and that I was currently overwriting my main storage drive. Of course I had backups of the most important things like photos and code, though not really synced for a couple of months so I lost some stuff permanently.
I can totally feel that sudden clot in the gut the moment you realize on which drive the action is happening, just by reading this.