This might be the most incredible thing you will learn about Unix today. echo '.!: keS i3l ldKo -3Q9 -=- 1' > /tmp/lol echo ':!. keS i3l ldKo -3Q9 -=- 1' >> /tmp/lol sleep 1 md5sum /tmp/lol (LOL) made by Sam Hocevar for the lulz.