[juneau-lug] Re: really headless?
- From: Sean Crites <bdk@xxxxxxx>
- To: juneau-lug@xxxxxxxxxxxxx
- Date: Thu, 14 Nov 2002 07:19:59 -0900
Ya, that was the one other thing that I found out about the serial
console. I've been recompiling my kernel every other day or so now as I
figure out I need new features. When compiling for SMP make sure you
turn on your hardware clock lock on. It took me two compiles to figure
that out. Also the newer kernels come default for the pii/iii support
turned on. When I initially compiled it I didn't drop down into the
processor support menu. My box was rebooted every time I selected the
newer kernel image. I had to turn pentium mmx on and all the others
off. Needless to say all the recompiles since go much faster w/ two
processors then one.
There is also an option in the kernel that allows you to get root from
the serial console that should be turned on; it is off by default. I'm
also running smoothwall and am going to do the same thing w/ that box.
If anyone else is thinking about going headless and need the serial
console access I suggest you go the DB9 Male/RJ-45 route and not buying
a null modem cable. Two DB9/RJ45's for about $1 each & we all have
networking cable to connect the two. Much cheaper then buying a null
modem cable & I think easier to expand and use.
3rd item down, part 31d1-17200
http://www.national-tech.com/catalog/modularadaptors.htm
Thanks Myron.
-sean
----- Original Message -----
From: Myron Davis <myrond@xxxxxxxxxxx>
Date: Thursday, November 14, 2002 2:20 am
Subject: [juneau-lug] Re: really headless?
> Hi bdk!
>
> Yeah it's because the os still thinks the vga adapter is the console
> :( , I forgot about recompiling the kernel, you need to go into
> character devices in make menuconfig, then enable support for console
> on virtual terminal, and support for console on serial port.
>
> And I may be missing something else as well.
>
> perhaps a line in /etc/syslog.conf, (I don't remember), or maybe it
> was a:
> rm /dev/console
> mknod /dev/console c 4 64 (e.g. ttyS0)
>
> (or perhaps a symlink from /dev/ttyS0 to /dev/console)... it's
> been a
> while but one of those options should do it.
>
> -Myron
>
> On Wed, 13 Nov 2002, bdk wrote:
>
> >
> > It looks like when I removed the video card I got the info
> during boot up
> > that I was looking for and the shutdown info in through the
> serial terminal.
> >
> > At 21:05 11/13/02 -0900, you wrote:
> >
> > >Myron, I got around to adding these two things to my box.
> Plugged in my
> > >null modem cable and setup hyperterm. Aren't I suppose to get
> all the boot
> > >info as things load up like you would if you were looking
> directly at the
> > >console? All I got was:
> > >
> > >LILO 22.2 Loading new.................
> > >
> > >Debian GNU/Linux 3.0 Osok ttyS0
> > >
> > >Osok login:
> > >
> > >Thanks.
> > >
> > >-sean
> > >
> > >
> > >At 22:04 11/03/02 -0800, you wrote:
> > > >Hi bdk!
> > > >
> > > >When you create headless machine's (without video cards) it
> is VERY
> > > >helpful if something goes wrong for you to get a console
> through a
> > > >serial port. (just in case). e.g. you make a error in your
> setup> > >sshd doesn't start or something that way you can plug in
> a null modem
> > > >cable.
> > > >
> > > >vi /etc/inittab
> > > >add the line
> > > >T0:23:respawn:/sbin/getty -L ttyS0 9600 vt100
> > > >
> > > >vi /etc/lilo.conf
> > > >at the very top add
> > > >serial=0,9600N8
> > > >
> > > >You don't have to have the box accessible via the serial port
> but from
> > > >personal experience it can be EXTREMELY helpful to plug in a
> > > >null-modem cable than taking the box apart and sticking
> > > >in a video card. (although video cards are now pretty cheap).
> > > >
> > > >If you want to run your box just w/o a monitor it'll work fine.
> > > >hope that helps...
> > > >
> > > >-Myron
> > > >
> > > >
> > > >On Sun, 03 Nov 2002, bdk wrote:
> > > >
> > > > >
> > > > > What would that do w/ the serial port, I know it would be
> good, but
> > > > "how" why?
> > > > >
> > > > > -sean
> > > > >
> > > > > At 20:15 11/03/02 -0800, you wrote:
> > > > > >Hi bdk!
> > > > > >
> > > > > >Linux works great w/o a video card. I recommend if you
> have a serial
> > > > > >port putting
> > > > > >T0:23:respawn:/sbin/getty -L ttyS0 9600 vt100
> > > > > >(if your serial port was on COM1)
> > > > > >also put in your lilo.conf
> > > > > >serial=0,9600N8 (e.g. com1)
> > > > > >
> > > > > >You will get a bios beep error because your bios will not
> detect a
> > > > > >video card, what I have done is hexedit a bios using
> awdhack (and
> > > > > >hiew) and do a search for speaker beeps and flip them
> around and
> > > > > >reburn your bios.
> > > > > >
> > > > > >-Myron
> > > > > >
> > > > > >On Sun, 03 Nov 2002, bdk wrote:
> > > > > >
> > > > > > >
> > > > > > > Can linux run w/o a video card? Or does headless just
> mean w/o a
> > > > monitor?
> > > > > > >
> > > > > > > I can always try to remove the card from the box and
> then boot, but
> > > > I'm in
> > > > > > > the process of installing debian and had to ask.
> > > > > > >
> > > > > > > -sean
> > > > > > >
> > > > > > >
> > > > > > > ------------------------------------
> > > > > > > This is the Juneau-LUG mailing list.
> > > > > > > To unsubscribe, send an e-mail to juneau-lug-
> request@xxxxxxxxxxxxx> > > with
> > > > > > the word unsubscribe in the subject header.
> > > > > >
> > > > > >-- Attached file included as plaintext by Ecartis --
> > > > > >
> > > > > >-----BEGIN PGP SIGNATURE-----
> > > > > >Version: GnuPG v1.0.6 (GNU/Linux)
> > > > > >Comment: For info see http://www.gnupg.org
> > > > > >
> > > > >
> >iD8DBQE9xfRXnfM/KCuG6/IRAqilAJ0fBLpYR2gnzpAU2TwIA/Bm0exYkACgiMDm>
> > > > >r2i+1DLEzSN6XM0ZNSKe5wM=
> > > > > >=P9kV
> > > > > >-----END PGP SIGNATURE-----
> > > > > >
> > > > > >
> > > > > >
> > > > > >------------------------------------
> > > > > >This is the Juneau-LUG mailing list.
> > > > > >To unsubscribe, send an e-mail to juneau-lug-
> request@xxxxxxxxxxxxx with
> > > > > >the word unsubscribe in the subject header.
> > > > >
> > > > >
> > > > > ------------------------------------
> > > > > This is the Juneau-LUG mailing list.
> > > > > To unsubscribe, send an e-mail to juneau-lug-
> request@xxxxxxxxxxxxx with
> > > > the word unsubscribe in the subject header.
> > > >
> > > >-- Attached file included as plaintext by Ecartis --
> > > >
> > > >-----BEGIN PGP SIGNATURE-----
> > > >Version: GnuPG v1.0.6 (GNU/Linux)
> > > >Comment: For info see http://www.gnupg.org
> > > >
> > > >iD8DBQE9xg3vnfM/KCuG6/IRArZQAKCHQsSlYye+IuacLLOjIeWisDpm1ACfQgh1
> > > >Oqb95me8cYAt8XkUKi5qwn8=
> > > >=MLb0
> > > >-----END PGP SIGNATURE-----
> > > >
> > > >
> > > >
> > > >------------------------------------
> > > >This is the Juneau-LUG mailing list.
> > > >To unsubscribe, send an e-mail to juneau-lug-
> request@xxxxxxxxxxxxx with
> > > >the word unsubscribe in the subject header.
> > >
> > >
> > >------------------------------------
> > >This is the Juneau-LUG mailing list.
> > >To unsubscribe, send an e-mail to juneau-lug-
> request@xxxxxxxxxxxxx with
> > >the word unsubscribe in the subject header.
> >
> >
> > ------------------------------------
> > This is the Juneau-LUG mailing list.
> > To unsubscribe, send an e-mail to juneau-lug-
> request@xxxxxxxxxxxxx with the word unsubscribe in the subject header.
>
> -- Attached file included as plaintext by Ecartis --
>
> -----BEGIN PGP SIGNATURE-----
> Version: GnuPG v1.0.6 (GNU/Linux)
> Comment: For info see http://www.gnupg.org
>
> iD8DBQE904cTnfM/KCuG6/IRAiIPAJ9ZuYsqzoiPUDNrXuYa+k4gkzF1PgCdFZjC
> 3MXbW/w/q/Lk0djtjsWbYK0=
> =yrXN
> -----END PGP SIGNATURE-----
>
>
>
> ------------------------------------
> This is the Juneau-LUG mailing list.
> To unsubscribe, send an e-mail to juneau-lug-request@xxxxxxxxxxxxx
> with the word unsubscribe in the subject header.
>
------------------------------------
This is the Juneau-LUG mailing list.
To unsubscribe, send an e-mail to juneau-lug-request@xxxxxxxxxxxxx with the
word unsubscribe in the subject header.
Other related posts:
