เพิ่มความปลอดภัยให้กับ Linux

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/