Some geeks have assembled a list of 58 Linux hacks.

It contains some very useful hacks, including:

• Running multiple X sessions
• Backup your website easily
• Finding the biggest files
• Defrag your databases
• Parallelise your build
• Save battery power
• Unclog open ports
• Faster Hard drives
• Access your programs remotely
• Generating package relationship diagrams
• Unmount busy drives
• Listing today’s files only
• Avoid common mistypes and long commands
• Where did that drive mount?
• Autorun USB devices
• Transferring files without ftp or scp
• Hardening ssh
• Stop replying to pings
• Slow down ping rates
• Password-less ssh
• Using rsync over ssh

The best being:

• Talk to your doctor!
• Super cow powers

From: http://www.linuxformat.co.uk/wiki/index.php/58_Cool_Hacks