[vox] Demo today

[Jonathan Stickel]

I was previously unaware of the magic sysreq keys.  They do look useful, 
  and I read the documentation as you suggest.  From what I can tell, it 
is compiled in my kernel (CONFIG_MAGIC_SYSRQ=y), but I am wondering if 
it is disabled with the run-time command:  "echo "0" > 
/proc/sys/kernel/sysrq", as suggested by the documentation.  In fact, my 
/proc/sys/kernel/sysrq contains the single character "0".  Where would I 
find this run time command?  Can I just delete it or comment it out? 
Thanks,

Jonathan


Peter Jay Salzman wrote:
> hi doug,
> 
> check out /usr/src/linux-2.4.20/Documentation/sysrq.txt
> 
> it's very short.  basically, you make the kernel:
> 
> 1. flush buffers ("sync disks")
> 2. remount all partitions as read-only
> 3. reboot
> 
> print screen == sysrq
> 
> alt-sysrq-s    flush
> alt-sysrq-u    remount partitions as read-only
> alt-sysrq-b    reboot
> 
> you can actually send TERM and KILL to all processes.   this is the kind
> of thing you should really read about before using.   it's short and
> well written.
> 
> pete
> 
> 
> begin R. Douglas Barbieri <doug@dooglio.net> 
> 
>>Okay, so explain to me the magic sysreq keys... :-) I experience lockups
>>sometimes when I'm trying to start up Win4Lin. It hoses my machine so
>>badly that Ctrl-Alt-Backspace won't even kill X (and Ctrl-Alt-Fn doesn't
>>even work. I have to hard restart when that happens).
>>
>>On Sat, Mar 15, 2003 at 09:38:11PM -0800, Bill Kendrick wrote:
>>
>>>Today's Linux demo was pretty successful.  Mike showed up (a bit late ;^) )
>>>with the Demo machine.  Before that, I just had the flyers set up, and
>>>a couple of kids came by, and I gave them Tux Paint CDs. :^)
>>>
>>>When the computer showed up, we started getting many more visitors.
>>>Questions ranged from "I use Linux at work, and the other day it /completely/
>>>locked up!" (Mike explained magic sysreq keys) to "Why would I want Linux?"
>>>(I said "for the good of humanity"; she really digged that answer, and
>>>stuck around and talked for a long time)
>>>
>>>Towards the latter half, Jeff Newmiller came by and set up his laptop,
>>>so we had one desktop, one laptop, and one PDA (which didn't get too much use).
>>>
>>>
>>>We worked on getting Apache configured to show off the LUGOD.org website,
>>>demo'd Tux Paint a lot, and played a little with getting OCR software to
>>>work (in response to someone's complaint about Windows).
>>>
>>>
>>>Henry - we should set one up for April or May!
>>>
>>>-- 
>>>bill@newbreedsoftware.com                                            Hire me!
>>>http://newbreedsoftware.com/bill/    http://newbreedsoftware.com/bill/resume/
>>>_______________________________________________
>>>vox mailing list
>>>vox@lists.lugod.org
>>>http://lists.lugod.org/mailman/listinfo/vox
>>
>>-- 
>>R. Douglas Barbieri
>>doug@dooglio.net
>>http://www.dooglio.net
>>
>>GPG Fingerprint : FE6A 6A57 2B95 7594 E534  BFEE 45F1 9E5E F30A 8A27
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>>GPG Public key  : http://www.dooglio.net/dooglio.asc
> 
> 
> 
>