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A couple days ago I accidentally (well, on purpose, but without thinking) deleted everything in /var/log. So of course, /var/log/packages was gone, and package management tools no longer worked. Doh! I reinstalled and am pretty much back up and running now, but that sure was stupid.
That experience prompted this thread. I thought we could have a little fun at our own expense and maybe prevent other people from making the same mistakes. I'm pretty sure most of us have done something stupid at some point (either that, or I'm in a very select company of idiots), so fess up!
I once typed "rm .*" to get rid of unspecified hidden files. I forgot that that glob includes "..", so started a recursive upwards delete. Fortunately I broke in before it got to the root partition, but I lost quite a lot of data from $HOME.
A few years ago, I bought a second-hand PC and wanted to replace the noisy fan by a more silent model. Installing the fan involved some cable cutting and soldering, and I remember not getting it right quite a few times, which eventually led me to do things in a haste, which in turn led to disaster. I assembled the PC back together and started it, and I thought: hey, this thing is really perfectly silent, wow. Except one of the cables actually led through (!) the CPU fan blades, thus blocking it. The PC had not yet finished to start up that I sensed a faint smell of burnt plastic and said farewell to my CPU.
Ok, my first PC back in the llate 80s=-early 90s, for some reason had a way of eating keyboards. Old big AT interface (6-pin IIRC?). I was probably 11 or 12. I decided instead of constantly replacing the keyboard to solder the keyboard lead to the motherboard itself. Didn't know how to solder properly either. Ended up dropping a big glob of solder across all pins of the AT connector and onto the motherboard.
Didn't know the proper was to remove solder, so I used my father's cordless drill to try and clean it up. Drilled right through the motherboard.
Distribution: Debian Sid AMD64, Raspbian Wheezy, various VMs
recently, due to "slightly sweaty fingers on new-fangled-capacitive-touch-touchpads I inadvertently deleted a lot of the hidden files in my home. Thankfully I could recall moast settings and had mh SSH keys on a USB drive.
Oh, there was the time I accidentaly wrote to the first drive in my RAID5 thinking it was the USB drive. Then, to compound matters, I saw the RAID was in trouble attempted tio re-assmeble with the wiped paartition as a member...
I had forgot that my 500GB backup disc was still plugged in from earlier in the day... so when the usb stick was plugged in it came up as /dev/sdc. I came back 30 minutes later to find all of my backups had been erased. Lol.
When I was first learning Linux in 2002 I ran a home server with insufficient security. The box was quickly owned; I was locked out of the root account. Embarrassing. Disconnected from the Internet and formatted the unit. Boy does this bring back bad memories.
Once I improperly installed a brand new SIMM module, one of the ends wasn't really inside the slot. Turn the computer on and watch the SIMM smoke, literally smoking. Run in circles, scream and shout. Then I yanked the power cable.