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Questions tagged [shutdown]

a command to turn off or reboot the system

63
votes
3answers
20k views

What is the difference between these commands for bringing down a Linux server?

Reading "What is the difference between Halt and Shutdown commands?" , I generally have an idea what does the command shutdown does, with or without -h/-r options. The "halt" command performs ...
95
votes
5answers
111k views

What is the difference between Halt and Shutdown commands?

What is the difference between the halt and shutdown commands?
55
votes
4answers
70k views

How to run a script with systemd right before shutdown?

What do I need to put in the [install] section, so that systemd runs /home/me/so.pl right before shutdown and also before /proc/self/net/dev gets destroyed? [Unit] Description=Log Traffic [Service] ...
22
votes
3answers
52k views

What exactly is “a stop job”, as in “A stop job is running…”?

After a shutdown command is issued, sometimes one gets a status message like this: A stop job is running for Session 1 of user xy and then the system hangs for awhile, or forever depending on ??? ...
95
votes
4answers
274k views

What is the difference between reboot , init 6 and shutdown -r now?

I just want to know difference between in reboot init 6 shutdown -r now and which is the safest and the best?
48
votes
7answers
79k views

A stop job is running for Session c2 of user

The following message appears almost every time I shutdown my computer: A stop job is running for Session c2 of user ... (1min 30s) It waits for 1min30s then continues the shutdown process. I follow ...
23
votes
2answers
26k views

How does the system shutdown of a linux kernel work internally?

I have somehow an rough idea of how the userspace and init-system (be it classic init sysV /upstart/ systemd) work at system shutdown. (Essentially there is an order succession of "Stop!", "Please ...
42
votes
3answers
133k views

How to shutdown Linux at a specific datetime from terminal?

It seems I can shutdown using sudo shutdown by specifying a time or minutes. Is there a way to specify datetime for shutdown?
30
votes
2answers
4k views

What is the difference between shutdown 18:00 and at 18:00 shutdown?

at 18:00 shutdown now and shutdown 18:00 , are they starting the same service? Do they work the same way?
15
votes
1answer
3k views

What happens when I press “Shut Down” from the GUI?

I have been banging my head against this for quite a while now. It's related to this question. I would like to find out exactly what happens when I choose to shut down my Linux box from the GUI. This ...
36
votes
2answers
3k views

How does the power button shut the computer down without root permission?

When I try to shutdown the computer from a command line or terminal I must have root privileges: amy@amy:~$ shutdown now shutdown: Need to be root and amy@amy:~$ halt halt: Need to be root but ...
16
votes
8answers
9k views

How to read the shut down messages afterwards?

I'm using Lubuntu 11.10. Every time I shut down I can read FAIL in red letters, but I can not read more. So, how to read the log messages and try to solve the problem?
20
votes
4answers
7k views

Is there a fastest way to shutdown the system?

Or is shutdown -h now the fastest it can get? I look for some syscall or similar that will allow to skip lots of the stuff done prior to shutdown (in particular to care about the running proccesses). ...
22
votes
3answers
29k views

Is it possible to stop a shutdown command?

Assuming you've just entered the command shutdown -h now (or something equivalent), is there realistically anything you can do (if you're quick enough) to prevent the machine shutting down?
5
votes
2answers
9k views

How to execute scripts in /usr/lib/systemd/system-shutdown/ at reboot or shutdown?

According to this answer and this bug report one can simply drop your script in /usr/lib/systemd/system-shutdown/ or for Debian in /lib/systemd/system-shutdown/ to have it executed at reboot or ...
3
votes
3answers
10k views

How to run a script at shutdown on Debian 9 or Raspbian 8 (Jessie)

I would like to execute this shell script at reboot and shut down: #!/bin/sh touch /test Its permissions are -rwxr-xr-x 1 root root 22 Feb 24 09:34 /etc/init.d/te1 And it has this links /etc/rc0....
2
votes
2answers
760 views

What is the difference between “when the operating system shuts down” and “when the kernel shuts down”?

Reading one of Stephen's excellent replies, I was wondering what differences are between When the operating system shuts down. ... and When the kernel shuts down, ... (... I’m considering that ...
2
votes
2answers
10k views

An init-script does not get called on shutdown

I have set up an init-script to control the state of a VirtualBox VM: #!/bin/sh #chkconfig: 35 99 5 #description: vTiger virtual machine ### BEGIN INIT INFO # Provides: vtigervm # Required-Start: $...
5
votes
2answers
343 views

How to protect against purge of bash history?

Following the answer: When closing multiple bash instances at the same time, there is a known race condition that may cause the history to be cleared. This occurs because there is no locking ...
2
votes
3answers
257 views

How can I send a notification with polkit 0.106?

I am developing a application to don't forget the pendrive. This app must lock the shutdown if a pendrive is connected to the machine. As this form, if the user wants to shutdown the system while a ...
1
vote
1answer
85 views

When the operating system shuts down, how does a service manager know that it should sends SIGTERM and SIGKILL to its services?

Reading one of Stephen's excellent replies, When the operating system shuts down, processes are shut down using SIGTERM and SIGKILL, but those signals don’t come from the kernel (or not directly — ...
0
votes
2answers
1k views

Error when running `shutdown -h now`

I have a BeagleBone Black wireless with Debian 8.7. I have created a user s with the command adduser s and then added the user to the sudoers file with the command usermod -a -G s. When I try to ...
96
votes
11answers
364k views

How to find out from the logs what caused system shutdown?

E.g. I'm seeing this in /var/log/messages: Mar 01 23:12:34 hostname shutdown: shutting down for system halt Is there a way to find out what caused the shutdown? E.g. was it run from console, or ...
51
votes
4answers
83k views

Execute a command before shutdown

I want to execute a simple command just before the computer shuts down (timing is not essential). For startup, I can use /etc/rc.local; is there something similar for shutdown? Note that I would ...
63
votes
6answers
10k views

Why does reboot and poweroff require root privileges? [duplicate]

To restart or shut off Linux from the terminal, one can use reboot and poweroff, respectively. However, both of these commands require root privileges. Why is this so? What security risk is posed by ...
20
votes
3answers
3k views

How to prevent shutdown when an SSH user is logged in?

I'm administrating a networked environment and I had an interesting situation arise yesterday. When a host is required to shutdown by a regular user, it refuses to do so if other users are logged in ...
15
votes
2answers
30k views

Is halt the same as “shutdown -H” and poweroff the same as “shutdown -P”?

I haven't found a clear answer to the differences between the two options to the command shutdown. Is halt the same as shutdown -H and poweroff the same as shutdown -P?
11
votes
4answers
13k views

Shutdown from login prompt in tty

Suppose I boot a Linux machine without GUI. When it displays a tty login prompt, can I shutdown the machine with a keyboard sequence? Of course I could type in my username and password and then sudo ...
8
votes
1answer
4k views

How to find out what turned off the computer?

Yesterday, after getting back home I found out my computer is turned off. Since it appeared it was cold shutdown (a lot of disk repairs were shown during boot up) I am wondering what was the cause. ...
6
votes
1answer
456 views

How do DE's call ACPI functions?

Okay, first off, this is not a problem I am facing, but I would like to understand this better. If I wish to shutdown / reboot my machine from the command line I need to call: $ sudo poweroff $ sudo ...
12
votes
3answers
13k views

How to simulate unplugged network cable or down server?

I have simulated network latency with netem and It's great. Now I want to simulate unplugged network cable or when server goes down. I need this to make testing of my application easier and I couldn't ...
7
votes
2answers
2k views

Explanation of file - org.freedesktop.login1.policy

I am using Ubuntu 16.04. There is a file located at /usr/share/polkit-1/actions/org.freedesktop.login1.policy which seems to control the permissions regarding shutdown/suspend/hibernate options. ...
5
votes
3answers
2k views

Ensure that loopback root and host are unmounted on shutdown

I'm trying to setup a Linux system that runs from an LVM-formatted image file. After some tinkering with the initramfs and boot options I managed to make it up and running by mounting the host file ...
3
votes
2answers
3k views

How to use uswsusp for standby/hibernation with systemd? (Debian)

I use Debian Jessie and want to use uswsusp for stanby/Hibernation. Installing and configuring is no problem and it also works when you execute s2disk manually. However with systemd the system seem to ...
9
votes
1answer
2k views

Does `shutdown -P now` safely unmount a USB drive mounted to `/dev/sdb1`?

I typically unmount my USB drive (using umount) from /dev/sdb1 before I shutdown my computer but if I shut it down using shutdown -P now and then restart it, the drive is no longer mounted. Is this ...
6
votes
4answers
10k views

xfce: Allow shutdown for non-root users

How do I allow shutdown for normal users in xfce? Currently, the log-out/restart/shutdown box only allows the log-out option, and having to switch to the console, logging in as root and shutting down ...
5
votes
2answers
3k views

systemd: running a script on shutdown after filesystems are mounted read-only

Is there a way to run a script on shutdown, after the file system is remounted as read-only? I've a raspberry pi connected to a wireless socket, which I can control via a sender and a script. I want ...
3
votes
0answers
362 views

Enable tty console login while “A stop job is running” (stop running forever, preventing shutdown)

A message like this one is often shown on shutdown: "A stop job is running ..." (nfs mount) This apparently even happens when the NFS server did not go away. But even if the connection to the NFS ...
3
votes
1answer
7k views

How to schedule shutdown every day?

We have a server that is used for Linux thin clients in a class. The server is started when required and I want to schedule it to power off at 22:00 every day to avoid power wasting. I thought of ...
3
votes
1answer
3k views

Why is a script in /etc/rc6.d not run on reboot?

I am trying to log shutdown/reboot on a Raspberry Pi. I am running latest Raspbian. This is my setup: cat /etc/init.d/log-shutdown.sh: #!/bin/sh ### BEGIN INIT INFO # Provides: log-...
2
votes
1answer
11k views

Configure power button to shutdown on Debian

I use Debian and I want my power button to shutdown the PC. Currently it sleeps, when I press it. Is there any command for it to make it shutdown?
0
votes
0answers
2k views

Fedora not shutting down

Whether I do shutdown -P now or sudo shutdown --halt now Fedora does not shutdown. It will send SIGTERM and SIGKILL as usual, but then just stops at the screen with the fedora logo. My only option is ...
8
votes
1answer
485 views

Battery drains while powered off after upgrade to kernel 4.13

After upgrading to kernel 4.13, the battery of my laptop started to drain while powered off (about 30% in one day). This didn't happen if I booted the laptop from kernel 4.12 or Windows 8.1, so the ...
7
votes
2answers
6k views

Gnome: how to close all applications?

I've configured the Debian system on my netbook to shut down whenever the battery runs too low. Problem is, shutting down kills all running applications without giving them any chance to save any ...
6
votes
2answers
4k views

How can I ensure only the root user have the right to halt/reboot the system?

CentOS Linux by default allows all users to have permission to "halt" & "reboot" the system by using the commands halt and reboot. How can I configure my system so that only the root user has the ...
4
votes
2answers
8k views

run a script at shutdown in Debian

I am using Debian wheezy. My problem is, I am using a limited 2.5 GB net connection and would like to capture my usage before shutting down. My idea is simply running a script as: #!/bin/bash date &...
4
votes
3answers
3k views

How do you prevent a DHCP release during shutdown?

I am currently using Ubuntu 14.04, but expect this to be applicable for different distros. I would like to prevent a DHCP release during shutdown, and opt for either the lease to expire or for a DHCP ...
3
votes
1answer
655 views

Shutting the computer down from Openbox

I've recently installed Openbox,and read a guide that said the PC should be shut down via this command: gdm-control --shutdown && openbox --exit However, it seems a bit counter intuitive. ...
3
votes
3answers
1k views

Shutdown procedure clarification

The book "How Linux Works" says the general shutdown procedure (independent of init system) is something like this: init asks every process to shut down cleanly. If a process doesn’t respond after a ...
3
votes
1answer
1k views

How to postpone shutdown with systemd?

I run a desktop computer, which typically is shut down for the nights and often also during the day, when not in use or left unattended. I usually shut it down from GUI (KDE 4.10), sometimes - from ...