Wow , nice to know.
Thanks,
Scarlett
On Mon, 2009-06-29 at 08:40 -0700, Ryan Rix wrote:
> Hey,
>
> Ever wonder what the SysRq key does on your computer? Most people have no idea
> that this can be one of the biggest lifesavers in a sticky situation.
>
> When your system hardlocks, either from a nasty process, a bug in X, or for
> some other reason, you risk losing gobs of data if you have to take your
> system offline. Journaling filesystems alleviate this issue to some extent but
> data loss is always a huge risk when taking a system down hard.
>
> But, one simple word can help you take this risk to virtually 0 the next time
> you must take a system down hard (holding the power button for 5 seconds):
> BUSIER - or backwards REISUB, more accurately
>
> R - resets the keyboard driver to raw mode
> E - Sends term to all running processes
> I - sends kill signal to all processes
> S - Syncs all mounted partitions
> U - unmount the filesystems and remount as read only
> B - reboot
>
> Pressing alt-SysRq and the keys above will send a command to the kernel (by
> passing X, applications and other things which may be causing the hardlock.
> This simple method is failsafe and will work in all situations except
> situations in which the kernel is busy, rather than an application. In that
> situation there is little you can do but hope and pray that the Journal holds.
>
> Ryan.
>
>
> ---------------------------------------------------
> PLUG-discuss mailing list - PLUG-discuss@lists.plug.phoenix.az.us
> To subscribe, unsubscribe, or to change your mail settings:
> http://lists.PLUG.phoenix.az.us/mailman/listinfo/plug-discuss
---------------------------------------------------
PLUG-discuss mailing list -
PLUG-discuss@lists.plug.phoenix.az.us
To subscribe, unsubscribe, or to change your mail settings:
http://lists.PLUG.phoenix.az.us/mailman/listinfo/plug-discuss
(text/plain)