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LXer: Use Magic SysRq combination key to recover from a frozen system in Linux

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http://www.linuxquestions.org – Published at LXer: The magic SysRq is a key combination understood by the Linux kernel, which allows the user to perform various low level commands regardless of the system's state. It is often used to recover from freezes, or to reboot a computer without corrupting the filesystem. The key combination consists of Alt, SysRq and another key, which controls the command issued Read More... (HowTos)