Deadly commands in Linux

Here are some linux commands that can kill your computer!
Don’t try them if you don’t know what you are doing:

1. Delete Everything Recursively!

rm -rf /

2.Send commands to Hard disk

any-command > /dev/sda

3. Format H.D.

mkfs.ext3 /dev/sda

4. Move everything to null

mv ~ /dev/null

5. Fork Bomb! Once run this command it acts like a virus and it multiplies it-self endlessly causing your system to over utilize cpu and ram until the computer crashes

:(){ :|: & };: