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?
Actually, I have a story that I'd consider an achievement even though it was extremely stupid and by all accounts should've bricked the system but didnt.
So I was on windows and wanted to install linux as a dual-boot on the main drive. The problem was that my mobo didnt like this particular and the only flash drive I've had, dropping it out mid-boot, before I got any usable terminal, so a usual install method wasn't an option. So I had this crazy idea to start a vmware vm in windows and pass the linux iso and the boot drive directly to it and try to install it live over the running system. Unfortunately, vmware guys thought of this and there's a check that disallows passing the boot drive to vms. So i created a bunch of .vmdks for another drive and fiddled with them in notepad until I somehow managed to trick vmware and at some point it started booting the same windows copy that I was sitting on. I quickly powered it off, added the linux iso and proceeded to install like I usually would. It did involve some partition shuffling, but, somehow, it went smoothly, linux installed, grub caught on, and even windows somehow survived, even though it was physically moved around on the disk. It serms that vmware later patched this out, because later in an attempt to re-create the trick of running the same copy of windows twice, but after updates to both windows and vmware, I was met with the same old error that boot drive is not allowed when trying to add that same virtual drive I had laying around.
I had a similar debacle, when I managed to corrupt a btrfs file system to point it wouldn't mount again...
I was preparing it to have as my main system on bare hardware. I had accidentally mounted the same block device simultaneously in the host and guest: kablamo silent corruption and all 5 hours of progress lost.^*^ :(
*shred the guest VM, host was ok.
I had a similar setup once. Dualboot, plus the VM with the same physical disk, to access windows, while running linux.
All it took was a small distraction... I've missed the grub timeout, and accidentally booted the same ubuntu partition in a VM that was running on the real HW. To shreds...
Allrighty, now we officially need a program (I'm hesitant to call it malware since technically it's for the user's good XD) that covertly replaces a running copy of windows with linux... Besides, I think it was possible before to install stuff like Ubuntu directly from windows?