Re: [gentoo-user] Emergency shutdown, how to?

[Volker Armin Hemmann <volker.armin.hemmann@tu-clausthal.de>]

On Mittwoch, 2. April 2008, Dale wrote:
> Volker Armin Hemmann wrote:
> > On Mittwoch, 2. April 2008, Steven Lembark wrote:
> >> Liviu Andronic wrote:
> >>  > On Fri, Mar 28, 2008 at 10:07 AM, Dale <dalek1967@bellsouth.net> 
wrote:
> >>  >>> By the way the safest and recommended command, although a bit
> >>  >>> longish should be ALT+SysRq(or print)+S(ync)+U(mount)+B(Reboot).
> >>  >>
> >>  >>  Since I wanted to shutdown instead of reboot, it would be ALT +
> >>  >> SysRq + S + U + O then correct?
> >>  >
> >>  > Are there any potential harms to the hardware / system in case one
> >>  > tends to abuse (i.e. use more often than necessary) of this command?
> >>  > It's so often so tempting to shut down your system fast.
> >>
> >> Short of a serious emergency (e.g., UPS with
> >> 30-sec lag and no input power) stick with
> >> 'shutdown -fh now'. The main problem is that
> >> you bypass the stop phase of all the app's
> >> started up via init.d; very little short of
> >> just hitting the reset switch or yanking the
> >> power.
> >
> > if you do it the right way, start with 'e' and 'i', all apps are cleanly
> > terminated/killed. So if an app does not quit cleanly, it is broken.
> >
> > The correct sequence is: e,i,u,b/o and it is absolutly save.
>
> Folks, keep in mind why I asked this question in the first place.  My
> power supply was frying and I needed a VERY fast shutdown.  This was not
> asked as a fast way to shutdown just because we are impatient or
> something.  This was for the event of a serious emergency where I needed
> a shutdown in just a very few seconds not a minute or two.  Some of my
> services take a while to stop, foldingathome being the longest one.
>
> Basically, this is not intended to be used to shutdown a puter on a
> regular basis, unless you burn out P/S's on a daily basis.  O-o
>
> Just didn't want someone to be using this on a regular basis and then
> wondering why their system has a new nickname, FUBAR.  :'(
>
> Dale
>
> :-)  :-)

even in an emergency, e,i,u,b/o is the right thing to do. Just don't wait 
after the e and follow it directly by the i.
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