[vishnu]

All I'm saying is, the power button is only there to turn the machine on. Proper Unix etiquette has always been to have the kernel turn the machine off via the 'shutdown' command which needs to be issued as root. Now, admittedly, if you don't have root access, you do have to use the power button, and if everything goes according to plan, the kernel will take over and do what it needs to when it sees the button has been actuated. To me, it's just not worth the risk. That's why, for example on Windows, you have to push and hold the power button down for five seconds to get the kernel to take you seriously and shut the system down.