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List: debian-user
Subject: Re: headless server with console on USB port
From: Rainer Dorsch <ml () bokomoko ! de>
Date: 2022-08-18 14:48:34
Message-ID: 3040376.x7Z2N3baHR () h370
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Hi Dan,
thanks for the quick response and explanations. That helps a lot to understand
how it is supposed to work. I do not care about the BIOS output, I rarely
touch bios settings, my usecase are OS upgrades, grub would be nice, but
kernel output and a terminal is what I was hoping for.
I am wondering if ready-made usb-to-usb solutions exist, which contain the
conversion to serial and back to usb internally....or if there are a serial
crossover cable and two usb-to-serial adapters in some boxes in our cellar :-)
Thanks again
Rainer
Am Donnerstag, 18. August 2022, 14:41:06 CEST schrieb Dan Ritter:
> Rainer Dorsch wrote:
> > is it possible to run a console on a USB port of a headless server?
>
> Yes and no.
>
> The T20 doesn't seem to have iDRAC (IPMI) support, so BIOS/UEFI
> is not available through a serial console.
>
> The first time you have an opportunity for a serial console is in GRUB;
> then again you have an opportunity for the kernel output; then finally
> you can have a login on a serial terminal.
>
> You will need a USB to RS232 serial adapter, and then an appropriate
> cable to talk to your terminal device. The other end can also be a USB
> to RS232 serial adapter. In between you might have a 9 pin
> serial cable or a specially wired RJ45 (looks like ethernet)
> cable.
>
> The name of the device should be something like /dev/ttyS0
> (S1,S2,S3...) or can be /dev/ttyUSB0. USB ports can be renumbered on
> each boot, but as long as there is only one serial adapter connected,
> it should always be recognized as /dev/ttyUSB0
>
> -dsr-
--
Rainer Dorsch
http://bokomoko.de/
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