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System freeze recovery

Quote from "Debian Reference"

"8.5.2 Alt-SysRq

Insurance against system malfunction is provided by the kernel compile
option "Magic SysRq key". Pressing Alt-SysRq on an i386, followed by one
of the keys r 0 k e i s u b, does the magic.
Un`r'aw restores the keyboard after things like X crashes. Changing the
console loglevel to `0' reduces error messages. sa`k' (system attention
key) kills all processes on the current virtual console. t`e'rminate
kills all processes on the current terminal except init. k`i'll kills
all processes except init.
`S'ync, `u'mount, and re`b'oot are for getting out of really bad
Debian default installation kernels are not compiled with this option at
the time this document is written. Recompile the kernel to activate this

Do the kernels from Etch on, have this option already compiled?


José Santos

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