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Destructive for me or for others?
for the terminal's operating system
alias cp="rm -rf"
bonus points for putting it into the shells RC file.
Not as destructive as deleting root, but a lot more sneakier
tar czf /dev/sda /home
dd if=/dev/random of=/dev/sda
Wipes the entire disk and replaced it with random data.
I'd imagine rm has easily caused the most destruction.
dd if=/dev/urandom of=/dev/sdx will overwrite every single byte of /dev/sdx with random data. Replace /dev/sdx with the drive you want to wipe. Optionally, specify a larger block size to speed it up more.
./fire_nukes.sh
I was a newbie user, telling a friend of mine about rm -rf /*. I typed it in a hit Enter, telling him it doesn't harm since I didn't enter sudo. But I'd forgotten that I have still permission to delete my home directory. ๐ฅฒ๐
sudo apt-get install factorio
Good luck recovering from that one