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Questions tagged [runlevel]

A run level is the operating state of the operating system. Run levels can be: "halt", "single user mode", "multi-user mode", "reboot", "graphical user interface mode/display manger" and others. Each run level starts or kills a set of processes and is denoted by a number typically from 0 to 6. Different operating systems may define different run levels.

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Ubuntu 18.04 startup questions regarding runlevels and *.wants directories

Is Ubuntu 18.04 using Upstart or systemd? I know with the directories named Rc0.d Rc1.d Rc2.d ......Rc6.d. we can control runlevels in Ubuntu 18.04. But what is the difference between what they do, ...
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Can same level runlevel scripts have the same priority?

Can same level runlevel scripts have the same priority? For instance, can say runlevel x have these 2 scripts: S10ScriptName1 and S10ScriptName2 ? If so, what is the execution order?
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Unable to change from graphical target to other systemd targets in Ubuntu

I am currently a newer user of terminal in Ubuntu. I was trying to demonstrate some features of targets in systemd. Each time that I do systemctl enable or systemctl isolate , I enter my credentials, ...
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221 views

Change runlevel with systemd [duplicate]

systemd still maintains the general idea of runlevels with its "Targets", but how do I change the system runlevel through systemd? I want to do something equivalent to the old init-script method of: ...
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gdm3 not loading at boot

I am trying to get Symless Synergy version 1.8.8 to autostart when my Ubuntu 18.04 client desktop boots up. I have followed these instructions carefully, but Synergy only starts after logging in. ...
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193 views

Telinit command not works

I wasn't aware of the telinit command and I've tried to use it without any good result. Below my command telinit 1 I obtain the following error: timeout opening/witing control channel /dev/initctl ...
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1answer
675 views

Running script at shutdown and reboot to prevent chromium session loss

I'm running Ubuntu 18.04.1 and I'm trying to create a script that shuts down Chromium properly before shutting down the system so that it doesn't give me "restore session" popup after booting. I ...
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193 views

Targets and Unit files on Boot System

I have been going through all the docs and examples regarding the targets (referred to as runlevel) for the past few days but I am still confused with the topic. Can anyone explained me the ...
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Are runlevels 0 and 6 a result or a transition?

The runlevels 0 and 6 have the meaning of shutting down or rebooting the system. If I enter the command init 0, the system will shut down as a result. However my question is if the system is ...
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What differences it will make, if i use “telinit 6” instead of “reboot” command to restart my computer? [duplicate]

I am trying to understand Run Levels in Unix, I found Runlevel 6 is state of reboot. So I tried to switch to run level 6 using the command telinit 6 and it worked same as reboot on my computer. I am ...
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Failed to enable unit: File log.service: No such file or directory

I want to log something before shutdown or poweroff. uname -a Linux xxx 4.9.0-4-amd64 #1 SMP Debian 4.9.51-1 (2017-09-28) x86_64 GNU/Linux systemctl get-default graphical.target runlevel N 5 To ...
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Run Python script along with OS boot

I'm booting my system with a custom Fedora 27 Workstation live OS which is containing a python script apart from the regular OS files. I want this enable_settings.py scripts to be executed along with ...
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Why does Linux Mint starts in runlevel 5 even though DEFAULT_RUNLEVEL is set to 2?

When studying about Linux runlevels I came across something I was unable to explain to myself while trying to change the DEFAULT_RUNLEVEL. When I boot Mint, it starts in runlevel 5, even though it ...
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471 views

Run skript on shutdown and restart

Based on some posts here, I try to run a simple script to clean up a folder with temporary content on restart and shutdown. Following the instructions and the READMEs I wrote this script: /etc/init....
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2k views

systemd-logind.service fails to start (when attempting to return from rescue.target to graphical.target). How do I fix it?

I am using Debian 8 ("jessie"). I need to run some services in maintenance mode, So changed from Graphical to rescue mode using , systemctl isolate rescue.target But When I tried to move back to ...
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2answers
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Why does `init 0` result in “Excess Arguments” on Arch install?

I am used to the old method of calling init 0 to shutdown. Bad, I know; but when I tried it on my new Arch install I get this: # init 0 Excess Arguments This confuses me because I thought systemd ...
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Adding run levels in ubuntu

I want my postgres service to start at run levels 2,3,4,5 and stop at 0,1,6. So, I ran the following command $ sudo update-rc.d postgresql start 30 2 3 4 5 . stop 30 0 1 6 . When I stop the ...
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How to set the default startup level on ubuntu 16.4

I'm in ubuntu 16.4 /etc/default/grub No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu 16.04.2 LTS Release: 16.04 Codename: xenial But I cannot find ...
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Where is the run level scripts in Manjaro and Arch?

When I use debian-base OS like Ubuntu, Lubuntu or anything else, I can see runlevel scripts in /etc/rc0.d, /etc/rc1.d, /etc/rc*.d folders. But I can't find this folders in Manjaro and arch Linux ...
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488 views

Can we enable Networking in single user mode of Linux? [duplicate]

Can we enable Networking in single user mode of Linux ? If Yes then how ?
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544 views

root password not working when entering in Single-User Mode

I want to mount the /var directory in a separate device, but I have to move some files from the current /var to a temporary storage, mount /var on the device that I want and then moving the data from ...
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What if the initdefault is set to 0 or 6 in RHEL7. How to solve it?

This might look stupid but i need to know. What if the initdefault is set to 0 or 6 in my redhat7 system. How to revert it back. As you can see i'm no expert so please give me a detailed explanation.
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Windows Subsystem for Linux is unable to determine current runlevel

Issue Many apt-get installs are failing b/c the system can't determine current runlevel Background specs: $ lsb_release -a No LSB modules are available. Distributor ID: Ubuntu Description: ...
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linux run levels: what is impact of running a httpd service on 35 and on 0123456

I know that, run level=0 => Halt/Shuts down system run level=1 => Single-User Mode run level=2 => Multi-User Mode run level=3 => Multi-User Mode with Networking run ...
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Does Ubuntu run level 2 have network stack configured?

I type the following command in my ubuntu 14.04 VM running on top of virtualbox: $uname -a Linux rex-VirtualBox 4.2.0-42-generic #49~14.04.1-Ubuntu SMP Wed Jun 29 20:22:11 UTC 2016 x86_64 x86_64 ...
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440 views

Why is runlevel 0:halt or runlevel6: reboot necessary

Why would you ever need to set the /etc/inittab to RL 0 or 6? Wouldn't you want your system to come back up after the reboot?
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466 views

Fedora systemctl isolate multi-user.target

Distro : Fedora 24 Virtualisation : VMware pro In a quest to learn about runlevels in Unix/Linux Systems and since i'm using Fedora with systemd , i use the following command to go from level 5 (...
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147 views

Why do init scripts not run multiple times?

I'm trying to understand what goes on when I start up a linux server. My linux server has files /etc/rc2.d/S03cron, /etc/rc3.d/S03cron, /etc/rc4.d/S03cron, /etc/rc5.d/S03cron which should start the ...
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1answer
4k views

chkconfig --add default runlevel

What is the default runlevel assigned when you run chkconfig --add for a program?
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1answer
299 views

How to Recover Debian of LK backports where runlevel conflict?

I did as root in my Debian 8.5 because wanted to test Matlab's thing but the commands removed some dependencies which affect the runlevel Run apt-get purge openjdk-7-jdk openjdk-7-doc openjdk-7-jre-...
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How to create a systemd target?

After searching plenty through plenty a post, Youtube video, and "documentation" on the matter of systemd, I'm still at a loss. The link (https://wiki.archlinux.org/index.php/systemd#...
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2k views

Unknown runlevel on Ubuntu 14.04, services not starting on boot

I rent a VPS from a VPS company and run an Ubuntu 14.04 web server there. Recently it had to be suspended by my provider for a while. After the suspension period (1-2 days), the VPS boots, but cannot ...
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184 views

SLES12SP1: How to add memcached to the new Services Manager

I installed a new SLES 12 SP1 VM from the scratch with memcached from https://memcached.org/. My question: On SLES 12 the /etc/init.d/<service> notation has gone. It is now provided by the ...
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135 views

Redhat & GUI/GNOME Struggle?

We have in our Company SysAdmin so damm stupied and lazy. Everytime I ask him for a Redhat Virtual Machine(VM),He just deploy a ready template with GUI and lot of package,a lot I think he just install ...
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Runlevels behaviour when kill script has failed

When I execute sudo init 3, the system executes the kill scripts in /etc/rc.3/ One of those scripts returns a failure (this is expected because the thing it's trying to do won't work). When I then do ...
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157 views

Simple manager for systemd

Is there a manager that would run in the console, similar to sysv-rc-conf, that works with the latest systemd under Linux? Ideally it would be able to operate on all runlevels, and be ncurses based.
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GDM doesn't start - Kali Linux

I've been having this problem since I installed genuine Nvidia GeForce drivers for my graphics card. My system boots normally, but when the login screen should show only black screen shows. The only ...
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145 views

How can output of runlevel be “1 S”?

When I switch from runlevel 3 to runlevel 1 on my CentOS 6 box the output of runlevel is 1 S: # runlevel 1 S I'd expect the output to be 3 1. It's not a big deal but I'm keen to understand the logic ...
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207 views

Suppress console output when switching runlevels

Is there any way to silence the output that occurs on TTY1 when switching runlevels? I'm talking about the output like in the following image: I have a simple UI that may be running on TTY1 when the ...
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1answer
576 views

Runlevel script

I want to make a simple script so that the user can easy change the runlevels. The script should prompt the user to choose the new runlevel, run the /sbin/init program and receive a confirmation ...
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1answer
1k views

How to login by text mode with LinuxMint 17.3?

I have a problem for to login LinuxMint 17.3, and want to login in text mode. But I couln't find where can I change runlevel. This is the login screen. I'm running LinuxMint in Virtualbox environment....
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Run init.d script during boot

I need to do something apparently quite simple: run a script on a Debian 8.2 machine during boot (or during shutdown, both of them are fine). The script just moves and renames some files, so the ...
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1answer
468 views

How to get out of runlevel 0 or 6?

Can I use any Linux live distribution to boot into my system and change the file for run level and set it to a valid run level when it has been set to run level 0 or 6?
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183 views

FTP server to start when changing runlevel 2 to 5

I've been searching for this a little while now: How do I, when I change from runlevel 2 to runlevel 5, start f.e. proftpd? When I go back to runlevel 2, the service should be stopped again. So - ...
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Ubuntu reboots at startup as default runlevel is set to 6

Someone has changed my default runlevel to 6 so whenever I start Ubuntu it reboots.. Can anyone help me by suggesting some solution how to change my default runlevel?
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Linux: how to test if in maintenance mode?

I want to run some things differently if I have booted into single-user/maintenance mode. I want to know how I can test in my .bashrc file. In particular, I would like to start tmux only in that mode....
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How to set up a runlevel 3 in Debian 8?

I have installed Debian 8, but I neeed to use just multi-user text mode, runlevel 3, instead of appear my Gnome 3. But I saw that doesn't exist /etc/inittab. And now?
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Why vim does not recognize new runlevel7 in inittab?

Mainly for test purpose, I wish to modify /etc/inittab and add a new runlevel to my system (/etc/rc7.d). I have not save my modification yet, because I'm confused by Vim behavior. Indeed, the editor ...
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213 views

Why do my run level directories contain only start scripts and no single kill script?

I learned here that for each runlevel exist a directory with start and kill scripts. The start scripts are activated on entering , the kill scripts on leaving the runlevel. Start scripts and kill ...
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What happens to the services that do not have a killing-script in the new run level?

I read, that each runlevel has its own set of services or daemons, which can be looked up in /etc/rcX.d (X for the respect runlevel), there are scripts which names start with S and start services of ...