Magic Sysreg key problems.

fred smith fredex at fcshome.stoneham.ma.us
Fri Aug 24 17:25:59 UTC 2012


On Wed, Aug 22, 2012 at 03:17:30PM +0200, Reindl Harald wrote:
> 
> 
> Am 22.08.2012 15:13, schrieb Aaron Konstam:
> > Well please try b and let me know if the reboot occurs. The problem is b
> > is the only one where the results are obvious. I am willing to believe
> > that people see the output in dmesg or /var/log/messages, but they don't
> > really know if the action is executed.
> 
> sure
> 
> S: you hear the emegency.sync on a RAID10 device
> K: i see that if KDE freezes a come back to Login
> 
> B: you SHOULD NEVER use it alone because you could also use hardware-reset
> 
> posted many times but nobody reads docs people telling:
> http://en.wikipedia.org/wiki/Magic_SysRq_key
> 
> 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.
> 
>     Hold down the Alt and SysRq (Print Screen) keys.
>     While holding those down, type the following keys in order, several seconds apart:
>     REISUB
>     Computer should reboot.

A mnemonic that helps me remember the above is that REISUB spells
BUSIER, backwards.


-- 
---- Fred Smith -- fredex at fcshome.stoneham.ma.us -----------------------------
    "Not everyone who says to me, 'Lord, Lord,' will enter the kingdom of
     heaven, but only he who does the will of my Father who is in heaven."
------------------------------ Matthew 7:21 (niv) -----------------------------


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