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>> --
>> Best Regards!
>> Yuqi Liu (刘雨齐),
>> M.S. Student in Computer Science,
>> University of Delaware.
>>
>> --
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>> [手机]:http://m.xdlinux.info/
>> 访问西电开源社区。
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>
>
>
> --
> Best regards,
> xidianlz
后来一些比较激进的发行版的出现,以及大家都开始和chrome彪版本号以后,这个功能已经默认在内核里面了。
A common use of the magic SysRq key is to perform a safe reboot of a Linux computer which has otherwise locked up. This can prevent a fsck being required on reboot and gives some programs a chance to save emergency backups of unsaved work.[4] The QWERTY (or AZERTY) mnemonics: "Raising Elephants Is So Utterly Boring", "Reboot Even If System Utterly Broken" or simply the word "BUSIER" read backwards, are often used to remember the following Sysrq-keys sequence:
unRaw (take control of keyboard back from X), tErminate (send SIGTERM to all processes, allowing them to terminate gracefully), kIll (send SIGKILL to all processes, forcing them to terminate immediately), Sync (flush data to disk), Unmount (remount all filesystems read-only), reBoot.
In practice, each command may require a few seconds to complete, especially if feedback is unavailable from the screen due to a freeze or display corruption.
When magic SysRq keys are used to kill a frozen graphical program, the program has no chance to restore text mode. This can make everything unreadable. The commands textmode (part of SVGAlib) and reset can restore text mode and make the console readable again.
On distributions that do not include a textmode
executable, the key command 'Ctrl'+'Alt'+'F1' may sometimes to force a
return to a text console. (Use 'F1', 'F2', 'F3', ..., 'F(n)', where 'n'
is the highest number of text consoles set up by the distribution.
'Ctrl'+'Alt'+ 'F(n+1)' would normally be used to reenter GUI mode on a
system on which the X server has not crashed.)
使用的时候要激活这个按键
echo 1 > /proc/sys/kernel/sysrq
具体内容可以参考wiki:http://en.wikipedia.org/wiki/Magic_SysRq_key