久一网络科技

There are different reasons for a computer to crash - there can be a programming bug, a memory issue, or other. When your computer seems to be dead, don't panic! And don't reach for that power button! There are five simple things you can try before killing the power:

1. Is the computer frozen? Try going into one of the VTs by pressing and F1. This way you may still have control of the computer and manage to kill the application which caused the problem. More on killing applications later.

2. If you can't change into a VT, try to kill the X session. This can be done by pressing . All applications that were opened during the session will automatically be killed, so you should gain control over the computer after you've been sent back to the login screen.

3. OK, so you can't kill X or go into VT. Let's do a reboot, which can safely be done by pressing . The machine will beep and start running the shutdown scripts.

4. If for some reason one or more of the shutdown scripts should die, and the computer stops the rebooting process, press the key combination again to force a reboot. This not safe if the scripts haven't gotten around to unmount the local filesystems.

5. Final way out: Your computer doesn't obey and none of above methods seem to give any response. Here's a little trick that might help, not known to many Linux users! The kernel has a small userspace communication line opened, so even if the computer has crashed badly (I haven't tried this during kernel-panic, though, can anyone confirm?) you can make it reboot safely. This method is safe, but should be used only if everything else fails! Hold down , and . While holding down these, type the following letters - in order - R E I S U B. The computer will unmount any filesystems that are locally mounted, and safely bring down the system. If you have trouble remembering the letter combination; think busier, only backwards.