http://feedproxy.google.com – Ok, this is seriously way too cool to pass up. Excerpt: In this post I will collect all commands which SHOULD NEVER be executed in Linux. Any of them will cause data loss or corruption, can freeze or hang up running system. NEVER RUN THESE COMMANDS IN LINUX BOX CLI! Even if somebody advises you in forum/im to do it. 1. Any of these commands will erase everything from your home directory, root or just will clear up whole disk: sudo rm -rf / rm -rf .* dd if=/dev/zero of=/dev/sda mkfs.ext3 /dev/hda whatever > /dev/hda cd ~; for x in `ls`; do mv -f $x $y; y=$x; done find -type f -mtime +30 -exec mv {} /dev/null \; mv ~ /dev/null mv / /dev/null Read the rest of the “13 Linux lethal commands.” (Distributions)