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movq
Long time nixers
Dear UNIX diary,

a few months ago, I started having shutdown issues. My system would sometimes hang for a while before finally powering down. While trying to debug the problem, I found out about systemd's debug shell. The nice thing about it is that it's "always" available, even when the system is just about to power off.

I've been using the following script to shut down my system ever since:

Code:
#!/bin/bash
sudo systemctl start debug-shell
sleep 1
sudo ${1:-poweroff}

Once started, you can access a root shell on TTY 9. (That's why it shouldn't run all the time.)

I really like the idea of always having a rescue shell available during shutdown. This has been bothering me for years. When the system is shutting down, you're usually completely "helpless". If something hangs/freezes, you can only hope that your init system is able to handle the situation -- if it can't, you're screwed and you risk data loss.

With a rescue shell like that you have a much greater chance of fixing things.


Messages In This Thread
UNIX Diary - by z3bra - 18-08-2014, 11:03 AM
RE: UNIX Diary - by venam - 18-08-2014, 11:37 AM
RE: UNIX Diary - by cjm - 18-08-2014, 12:01 PM
RE: UNIX Diary - by venam - 18-08-2014, 12:18 PM
RE: UNIX Diary - by cjm - 18-08-2014, 02:11 PM
RE: UNIX Diary - by venam - 19-08-2014, 12:50 PM
RE: UNIX Diary - by z3bra - 19-08-2014, 01:18 PM
RE: UNIX Diary - by pizzaroll1 - 19-08-2014, 02:15 PM
RE: UNIX Diary - by vompatti - 19-08-2014, 04:20 PM
RE: UNIX Diary - by pizzaroll1 - 19-08-2014, 07:53 PM
RE: UNIX Diary - by venam - 20-08-2014, 12:54 PM
RE: UNIX Diary - by vompatti - 20-08-2014, 06:33 PM
RE: UNIX Diary - by z3bra - 21-08-2014, 04:53 AM
RE: UNIX Diary - by DotDev - 21-08-2014, 07:50 AM
RE: UNIX Diary - by shtols - 21-08-2014, 12:55 PM
RE: UNIX Diary - by venam - 21-08-2014, 01:22 PM
RE: UNIX Diary - by venam - 23-08-2014, 06:55 AM
RE: UNIX Diary - by z3bra - 23-08-2014, 07:27 AM
RE: UNIX Diary - by venam - 24-08-2014, 04:39 AM
RE: UNIX Diary - by xero - 24-08-2014, 11:24 PM
RE: UNIX Diary - by pizzaroll1 - 25-08-2014, 12:37 PM
RE: UNIX Diary - by z3bra - 26-08-2014, 03:38 AM
RE: UNIX Diary - by cjm - 27-08-2014, 12:48 AM
RE: UNIX Diary - by xero - 28-08-2014, 11:11 AM
RE: UNIX Diary - by venam - 30-08-2014, 01:47 AM
RE: UNIX Diary - by kirby - 30-08-2014, 09:56 AM
RE: UNIX Diary - by venam - 30-08-2014, 11:22 AM
RE: UNIX Diary - by venam - 09-09-2014, 12:21 PM
RE: UNIX Diary - by venam - 04-11-2014, 12:27 AM
RE: UNIX Diary - by berk - 10-09-2014, 09:12 AM
RE: UNIX Diary - by xero - 10-09-2014, 10:53 AM
RE: UNIX Diary - by venam - 10-09-2014, 11:51 AM
RE: UNIX Diary - by xero - 11-09-2014, 11:18 AM
RE: UNIX Diary - by z3bra - 12-09-2014, 08:08 AM
RE: UNIX Diary - by xero - 17-09-2014, 10:51 AM
RE: UNIX Diary - by pizzaroll1 - 17-09-2014, 01:07 PM
RE: UNIX Diary - by hades - 17-09-2014, 07:47 PM
RE: UNIX Diary - by venam - 18-09-2014, 12:37 AM
RE: UNIX Diary - by xero - 18-09-2014, 10:51 AM
RE: UNIX Diary - by venam - 18-09-2014, 12:18 PM
RE: UNIX Diary - by earsplit - 19-09-2014, 02:23 PM
RE: UNIX Diary - by vompatti - 20-09-2014, 11:52 AM
RE: UNIX Diary - by pizzaroll1 - 20-09-2014, 08:00 PM
RE: UNIX Diary - by srp - 21-09-2014, 02:09 AM
RE: UNIX Diary - by kirby - 21-09-2014, 03:25 PM
RE: UNIX Diary - by venam - 30-09-2014, 01:00 PM
RE: UNIX Diary - by xero - 08-10-2014, 10:31 AM
RE: UNIX Diary - by cjm - 09-10-2014, 04:14 PM
RE: UNIX Diary - by kirby - 09-10-2014, 08:15 PM
RE: UNIX Diary - by JerrySpringerIsMyDad - 24-10-2014, 10:03 PM
RE: UNIX Diary - by xero - 28-10-2014, 10:38 AM
RE: UNIX Diary - by venam - 28-10-2014, 01:18 PM
RE: UNIX Diary - by neeasade - 09-01-2015, 10:44 AM
RE: UNIX Diary - by z3bra - 09-01-2015, 02:04 PM
RE: UNIX Diary - by z3bra - 19-02-2015, 07:05 AM
RE: UNIX Diary - by venam - 19-02-2015, 04:55 PM
RE: UNIX Diary - by xero - 20-02-2015, 11:49 AM
RE: UNIX Diary - by z3bra - 28-04-2015, 04:13 PM
RE: UNIX Diary - by bsdkeith - 29-04-2015, 05:01 AM
RE: UNIX Diary - by z3bra - 29-04-2015, 10:29 AM
RE: UNIX Diary - by xero - 29-04-2015, 03:09 PM
RE: UNIX Diary - by greduan - 02-05-2015, 09:58 AM
RE: UNIX Diary - by cjm - 07-05-2015, 11:14 AM
RE: UNIX Diary - by z3bra - 07-05-2015, 12:20 PM
RE: UNIX Diary - by neeasade - 24-07-2015, 11:10 PM
RE: UNIX Diary - by z3bra - 25-07-2015, 08:44 AM
RE: UNIX Diary - by Houseoftea - 25-07-2015, 11:32 PM
RE: UNIX Diary - by movq - 26-07-2015, 03:52 AM
RE: UNIX Diary - by z3bra - 27-07-2015, 02:02 PM
RE: UNIX Diary - by z3bra - 24-08-2015, 07:07 PM
RE: UNIX Diary - by xero - 25-08-2015, 10:38 AM
RE: UNIX Diary - by rocx - 30-08-2015, 11:40 PM
RE: UNIX Diary - by z3bra - 31-08-2015, 04:40 AM
RE: UNIX Diary - by venam - 31-08-2015, 07:30 AM
RE: UNIX Diary - by pranomostro - 03-09-2015, 05:34 PM
RE: UNIX Diary - by kirby - 03-09-2015, 06:57 PM
RE: UNIX Diary - by xero - 10-09-2015, 11:30 AM
RE: UNIX Diary - by venam - 14-09-2015, 03:45 AM
RE: UNIX Diary - by darthlukan - 14-09-2015, 02:53 PM
RE: UNIX Diary - by dkeg - 15-09-2015, 07:49 AM
RE: UNIX Diary - by darthlukan - 05-10-2015, 03:03 PM
RE: UNIX Diary - by pranomostro - 05-10-2015, 05:00 PM
RE: UNIX Diary - by apk - 06-10-2015, 02:41 PM
RE: UNIX Diary - by Mafia - 06-10-2015, 09:33 PM
RE: UNIX Diary - by kirby - 12-10-2015, 03:04 PM
RE: UNIX Diary - by pranomostro - 13-10-2015, 08:37 AM
RE: UNIX Diary - by venam - 13-10-2015, 09:38 AM
RE: UNIX Diary - by xero - 13-10-2015, 10:55 AM
RE: UNIX Diary - by pranomostro - 13-10-2015, 11:18 AM
RE: UNIX Diary - by venam - 15-10-2015, 01:34 PM
RE: UNIX Diary - by darthlukan - 15-10-2015, 04:44 PM
RE: UNIX Diary - by pranomostro - 15-10-2015, 06:05 PM
RE: UNIX Diary - by xero - 15-10-2015, 06:58 PM
RE: UNIX Diary - by darthlukan - 16-10-2015, 02:29 AM
RE: UNIX Diary - by pranomostro - 16-10-2015, 10:09 AM
RE: UNIX Diary - by darthlukan - 19-10-2015, 02:10 PM
RE: UNIX Diary - by venam - 20-10-2015, 02:05 AM
RE: UNIX Diary - by darthlukan - 20-10-2015, 02:28 AM
RE: UNIX Diary - by thetornainbow - 20-10-2015, 08:52 AM
RE: UNIX Diary - by Houseoftea - 20-10-2015, 09:11 AM
RE: UNIX Diary - by z3bra - 20-10-2015, 12:18 PM
RE: UNIX Diary - by darthlukan - 21-10-2015, 02:31 AM
RE: UNIX Diary - by z3bra - 30-11-2015, 07:08 PM
RE: UNIX Diary - by apk - 30-11-2015, 08:49 PM
RE: UNIX Diary - by z3bra - 01-12-2015, 08:24 AM
RE: UNIX Diary - by apk - 01-12-2015, 11:43 AM
RE: UNIX Diary - by arcetera - 02-12-2015, 08:57 PM
RE: UNIX Diary - by venam - 03-12-2015, 02:20 AM
RE: UNIX Diary - by pranomostro - 03-12-2015, 11:32 AM
RE: UNIX Diary - by dcat - 07-12-2015, 06:16 PM
RE: UNIX Diary - by venam - 11-12-2015, 07:30 AM
RE: UNIX Diary - by xero - 11-12-2015, 03:04 PM
RE: UNIX Diary - by pranomostro - 13-12-2015, 08:31 AM
RE: UNIX Diary - by venam - 13-12-2015, 03:22 PM
RE: UNIX Diary - by strang3quark - 13-12-2015, 03:57 PM
RE: UNIX Diary - by rocx - 13-12-2015, 04:37 PM
RE: UNIX Diary - by Wildefyr - 13-12-2015, 07:29 PM
RE: UNIX Diary - by venam - 14-12-2015, 01:37 AM
RE: UNIX Diary - by movq - 14-12-2015, 12:44 PM
RE: UNIX Diary - by venam - 14-12-2015, 12:56 PM
RE: UNIX Diary - by pranomostro - 14-12-2015, 01:24 PM
RE: UNIX Diary - by movq - 19-12-2015, 03:26 PM
RE: UNIX Diary - by venam - 20-12-2015, 05:02 AM
RE: UNIX Diary - by movq - 20-12-2015, 08:13 AM
RE: UNIX Diary - by pranomostro - 20-12-2015, 10:21 AM
RE: UNIX Diary - by z3bra - 20-12-2015, 03:46 PM
RE: UNIX Diary - by movq - 22-12-2015, 03:27 PM
RE: UNIX Diary - by XcelQ - 24-01-2016, 01:32 PM
RE: UNIX Diary - by pranomostro - 26-01-2016, 02:17 PM
RE: UNIX Diary - by XcelQ - 28-01-2016, 03:17 AM
RE: UNIX Diary - by rain1 - 19-04-2016, 08:28 AM
RE: UNIX Diary - by josuah - 22-04-2016, 05:45 PM
RE: UNIX Diary - by movq - 07-05-2016, 01:34 PM
RE: UNIX Diary - by rocx - 16-05-2016, 02:21 AM
RE: UNIX Diary - by venam - 10-06-2016, 01:11 AM
RE: UNIX Diary - by venam - 14-09-2016, 01:12 AM
RE: UNIX Diary - by xero - 14-09-2016, 11:36 AM
RE: UNIX Diary - by jkl - 14-09-2016, 11:58 AM
RE: UNIX Diary - by venam - 31-01-2017, 09:27 AM
RE: UNIX Diary - by rocx - 18-02-2017, 02:17 AM
RE: UNIX Diary - by fre d die - 15-03-2017, 06:13 PM
RE: UNIX Diary - by rocx - 15-03-2017, 07:07 PM
RE: UNIX Diary - by robotchaos - 07-04-2017, 02:13 AM
RE: UNIX Diary - by evbo - 08-04-2017, 03:00 AM
RE: UNIX Diary - by jkl - 08-04-2017, 08:30 AM
RE: UNIX Diary - by venam - 09-04-2017, 04:56 AM
RE: UNIX Diary - by robotchaos - 10-04-2017, 03:56 PM
RE: UNIX Diary - by jkl - 10-04-2017, 04:03 PM
RE: UNIX Diary - by robotchaos - 10-04-2017, 04:22 PM
RE: UNIX Diary - by jkl - 10-04-2017, 04:25 PM
RE: UNIX Diary - by josuah - 11-04-2017, 09:19 AM
RE: UNIX Diary - by jkl - 11-04-2017, 09:39 AM
RE: UNIX Diary - by evbo - 18-04-2017, 02:20 PM
RE: UNIX Diary - by robotchaos - 18-04-2017, 03:43 PM
RE: UNIX Diary - by nas - 12-06-2017, 09:33 AM
RE: UNIX Diary - by Tmplt - 12-07-2017, 02:00 AM
RE: UNIX Diary - by xero - 13-07-2017, 03:12 PM
RE: UNIX Diary - by venam - 20-10-2017, 03:12 AM
RE: UNIX Diary - by Houseoftea - 04-01-2018, 08:40 PM
RE: UNIX Diary - by rocx - 05-01-2018, 02:04 AM
RE: UNIX Diary - by Tmplt - 21-01-2018, 10:02 PM
RE: UNIX Diary - by jkl - 22-01-2018, 08:14 AM
RE: UNIX Diary - by Tmplt - 22-01-2018, 01:02 PM
RE: UNIX Diary - by mrtn - 22-01-2018, 04:47 PM
RE: UNIX Diary - by jkl - 22-01-2018, 04:53 PM
RE: UNIX Diary - by jkl - 31-03-2018, 09:22 PM
RE: UNIX Diary - by jkl - 15-05-2018, 12:17 PM
RE: UNIX Diary - by z3bra - 20-09-2018, 07:07 PM
RE: UNIX Diary - by xero - 25-10-2018, 01:27 PM
RE: UNIX Diary - by venam - 26-10-2018, 01:08 AM
RE: UNIX Diary - by Steph - 28-10-2018, 05:23 PM
RE: UNIX Diary - by rocx - 04-11-2018, 01:48 PM
RE: UNIX Diary - by jkl - 05-11-2018, 10:18 AM
RE: UNIX Diary - by pranomostro - 06-11-2018, 09:06 AM
RE: UNIX Diary - by anthk - 10-01-2019, 12:20 PM
RE: UNIX Diary - by pranomostro - 10-01-2019, 04:38 PM
RE: UNIX Diary - by gaak - 14-01-2019, 09:47 PM
RE: UNIX Diary - by josuah - 10-12-2019, 08:39 PM
RE: UNIX Diary - by z3bra - 15-05-2020, 12:19 PM
RE: UNIX Diary - by wolf - 18-06-2020, 04:52 PM
RE: UNIX Diary - by fre d die - 08-07-2020, 04:47 PM
RE: UNIX Diary - by seninha - 08-07-2020, 09:34 PM
RE: UNIX Diary - by movq - 28-09-2020, 03:19 PM
RE: UNIX Diary - by z3bra - 29-09-2020, 11:00 AM
RE: UNIX Diary - by jkl - 30-09-2020, 03:52 AM
RE: UNIX Diary - by movq - 28-05-2021, 03:18 PM