[TriLUG] Re: console access through serial port?

[lfwelty]

Will this allow you to run headless?

Ben Boulanger wrote:
> 
> On Thu, 18 Apr 2002, Rodent of Unusual Size wrote:
> > 1. Is there any way to get access to the console through the
> >    serial port?  I have another system that does this for VMS
> >    and T64U systems (anyone remember VCS?), but it's unclear
> >    to me whether Linux supports it -- and, if so, how I can
> >    set it up.  I basically want to be able to give an irresistable
> >    three finger salute through the serial port if need be, to
> >    *force* a crash/reboot.
> 
> To get kernel info output to the serial line (and lose it on the VGA
> line), in lilo.conf add:
> serial=0,38400n8
>         image=blah
>         append="console=ttyS0,38400"
> 
> and to get a vty on your serial line, in inittab add something like:
>         s0:12345:respawn:/sbin/mingetty ttyS0 DT38400 ansi
> 
> Then connect up the proper cable (Null modem for computer to computer) and
> run minicom or some other terminal program on it.
> 
> > 2. Provided I can get in, is there any way I can *crash* the
> >    system so I can take a look at a dump to figure out WIH was
> >    going on to wedge it?
> 
> There's a few different things you can do (gdb?) to crash a system, you
> should be able to find that on google... but I wonder if that kernel
> config option "SysRq key" would help you here.  Check the kernel stuff on
> that one.
> 
> Ben
> --
> 
> A gem cannot be polished without friction, nor a man perfected without
> trials.
> 
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