"Learn these 10 tricks and you'll be the most powerful Linux® systems administrator in the universe...well, maybe not the universe, but you will need these tips to play in the big leagues. Learn about SSH tunnels, VNC, password recovery, console spying, and more. Examples accompany each trick, so you can duplicate them on your own systems."
Trick 1: Unmounting the unresponsive DVD drive
Trick 2: Getting your screen back when it's hosed
Trick 3: Collaboration with screen
Trick 4: Getting back the root password
Trick 5: SSH back door
Trick 6: Remote VNC session through an SSH tunnel
Trick 7: Checking your bandwidth
Trick 8: Command-line scripting and utilities
Trick 9: Spying on the console
Trick 10: Random system information collection
http://www.ibm.com/developerworks/linux/library/l-10sysadtips/
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