From owner-freebsd-hackers Fri Oct 11 01:34:11 1996 Return-Path: owner-hackers Received: (from root@localhost) by freefall.freebsd.org (8.7.5/8.7.3) id BAA28489 for hackers-outgoing; Fri, 11 Oct 1996 01:34:11 -0700 (PDT) Received: from irz301.inf.tu-dresden.de (irz301.inf.tu-dresden.de [141.76.1.11]) by freefall.freebsd.org (8.7.5/8.7.3) with SMTP id BAA28462 for ; Fri, 11 Oct 1996 01:34:02 -0700 (PDT) Received: from sax.sax.de (sax.sax.de [193.175.26.33]) by irz301.inf.tu-dresden.de (8.6.12/8.6.12-s1) with ESMTP id KAA17792; Fri, 11 Oct 1996 10:26:19 +0200 Received: (from uucp@localhost) by sax.sax.de (8.6.12/8.6.12-s1) with UUCP id KAA09613; Fri, 11 Oct 1996 10:26:18 +0200 Received: (from j@localhost) by uriah.heep.sax.de (8.7.5/8.6.9) id KAA04744; Fri, 11 Oct 1996 10:07:04 +0200 (MET DST) From: J Wunsch Message-Id: <199610110807.KAA04744@uriah.heep.sax.de> Subject: Re: Serial console for FreeBSD? To: freebsd-hackers@freebsd.org (FreeBSD hackers) Date: Fri, 11 Oct 1996 10:07:04 +0200 (MET DST) Cc: speth@scruz.net Reply-To: joerg_wunsch@uriah.heep.sax.de (Joerg Wunsch) In-Reply-To: <6660.844992222@time.cdrom.com> from "Jordan K. Hubbard" at "Oct 10, 96 05:03:42 pm" X-Phone: +49-351-2012 669 X-PGP-Fingerprint: DC 47 E6 E4 FF A6 E9 8F 93 21 E0 7D F9 12 D6 4E X-Mailer: ELM [version 2.4ME+ PL17 (25)] MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-hackers@freebsd.org X-Loop: FreeBSD.org Precedence: bulk As Jordan K. Hubbard wrote: > > disasters. I'd particularly like to be able to control the > machine in single > user mode after a failed fsck. Does FreeBSD > support this level of control? > Yep! See /sys/i386/conf/LINT where COMCONSOLE is defined. On > ftp.cdrom.com, in fact, the console is watched by yet another machine > which can also reset it under remote control. Better yet, patch your bootblocks to force a serial console. The bootblocks already allow you to toggle between the serial and graphics console with -h; all you need is changing the default. This gives you the added feature that you can boot an alternate kernel even with a serial console. cd /sys/i386/boot/biosboot vi Makefile # remove a comment character there make all install disklabel -B sd0 That's all... -- cheers, J"org joerg_wunsch@uriah.heep.sax.de -- http://www.sax.de/~joerg/ -- NIC: JW11-RIPE Never trust an operating system you don't have sources for. ;-)