I accidentally untarred archive intended to be extracted in root directory, which among others included some files for /etc directory.
I went on to rm -rv ~/etc, but I quickly typed rm -rv /etc instead, and hit enter, while using a root account.
You use btrfs, right? Right???
Tried the terminal emulator for the first time today, but I kinda can not get used to the fact, that I cannot move it around :(