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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16
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4answers
8k views

Does systemd still know about runlevels?

Does systemd still have the concept of runlevels? For example is it pointless to use telinit <number>?
16
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1answer
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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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2answers
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Create and control start up scripts in BusyBox

I have compiled a custom linux kernel in BusyBox. BusyBox init does not support runlevels. When the kernel boots up in BusyBox, it first executes init which looks for the specified runlevel in /etc/...
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5answers
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Why is my Debian jessie always in runlevel 5?

I have configured the lines in /etc/inittab as follows: # The default runlevel. id:2:initdefault: But after logging in the output of runlevel is as follows: N 5 So why am I in runlevel 5 instaed ...
7
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3answers
5k views

Rings and run levels

The question stated below might not be technically correct(misconception) so it would be appreciable if misconception is also addressed. Which ring level do the different *nix run levels operate in? ...
6
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5answers
38k views

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?
6
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2answers
414 views

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 ...
6
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2answers
3k views

What happens if I set default system runlevel to 0 or 6?

What I understand from runlevels is that in each level some programs have permission to be executed and some don't. runlevel 3 boots system into CLI and runlevel 5 starts the default GUI. But I don't ...
4
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3answers
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How to return either “on” or “off” for: chkconfig --list | grep httpd

To ensure httpd is automatically started on reboot. I simply run this command chkconfig httpd on what I am looking for is a way to be told if this setting is on or off instead of this command ...
4
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3answers
2k views

Do I need to stop processes like mysql or apache before “reboot”?

I have been wondering if issuing a reboot command safely stops running LAMP processes like MySQL or Apache?
4
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1answer
92 views

Softlink in rc0.d is working on poweron rather than shutdown

I want to run a script on poweroff in Ubuntu. so I made a script, placed it in init.d & made a softlink in rc0.d with name S36xyz. my script is working perfectly when I run it in terminal. so ...
4
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2answers
1k views

How to associate a script at boot time to a specific run level?

I am trying to understand how run levels work. I understand the meaning of the 7 run levels and I understand that they were usually configured by /etc/inittab, which used to call /etc/init.d/rc, which ...
4
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1answer
631 views

Solaris 10 - Is it possible to reboot a system from a startup script?

I have a Solaris 10 test guest logical domain (LDom). I plan to have the network on this be reconfigured before rebooting using a startup script in /etc/rc0.d. At the moment, when the system boots, ...
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3answers
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How do you boot Puppy Linux Slacko into the command line?

How do you boot Puppy Linux Slacko (or Precise or Wary) into the command line? I wish to startx only if I need it. Unfortunately it does not seem to copy Slackware's traditional /etc/inittab runlevel ...
4
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1answer
3k views

Configuring Yaboot and Debian to Boot into a Command Line Login Shell?

I have a Debian Squeeze variant (MintPPC 9) installed on an old Mac Powerbook G4 (PowerPC CPU). I wish to boot it into a multiuser CLI login shell instead of automatically booting into the login ...
3
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1answer
9k views

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 ...
3
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1answer
607 views

SysV init run levels

On a system that uses SysV init run levels such as Centos 5, when the OS is booting, does it go straight to the run level defined in /etc/inittab? If I change my run level using the init command do ...
3
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1answer
251 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 ...
3
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1answer
2k views

Relationship among runlevels and virtual terminals (TTY)

When I switch from rulevel 5 to 3 (with init command) and I press CtrlAltF1 up to F7, I realize that now I’m on TTY1 instead of TTY7 and when I switch back to runlevel 5 I return back to TTY7. Why? ...
3
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0answers
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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 ...
3
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0answers
603 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 ...
2
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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?
2
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1answer
497 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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1answer
2k views

How can I examine RUNLEVEL from a bash script on Rasbpian?

I'm writing a bash script that needs to examine the current runlevel, and do different things depending on it. For most Linux distros, it seems there should be a RUNLEVEL environment variable, and if ...
2
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1answer
830 views

Shutdown script seems to be executed twice

I have a small backup bash script that I wrote for my computer at work. I have copied the script into /etc/rc0.d/ and called it K01backup so it is executed before anything else upon shutdown. It backs ...
2
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1answer
307 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-...
2
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1answer
596 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 ...
2
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1answer
202 views

What's the difference between SysV and SysV-like systems when changing runlevels?

I am planning to take the LPI exam, and need to know how SysV works. As far as I can tell, a real SysV system is described here: http://www.softpanorama.org/Commercial_linuxes/Startup_and_shutdown/...
2
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0answers
790 views

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 ...
2
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0answers
429 views

How are runlevels from CentOS 6 chkconfig translated for CentOS 7 systemctl?

How would I translate the following command from CentOS 6 to run in CentOS 7? chkconfig --level 345 dovecot on My first guess is to type the following instead: systemctl enable dovecot But ...
2
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1answer
503 views

Security drawbacks of disabling tty password check

I found that, in /etc/inittab, this modification (-a username) for the user u disables the login/password check for all tty:s: 1:2345:respawn:/sbin/getty -a u 38400 tty1 2:23:respawn:/sbin/getty -a u ...
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3answers
2k views

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 ...
1
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1answer
4k views

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: ...
1
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1answer
613 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: ...
1
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1answer
504 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....
1
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1answer
160 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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2answers
2k views

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 ...
1
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2answers
187 views

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?
1
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1answer
39 views

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 ...
1
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1answer
761 views

Send sleep command to usb disk mounted as /home (Fedora 20) from shutdown script

I have a usb sata2 drive connected to usb that is mounted as /home. When I turn off the computer/laptop the disk makes some high pitch sound as if the disks were still spinning and heads were not ...
1
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1answer
3k views

Multi-user text mode runlevel in Ubuntu

I use Ubuntu as a server, and I want to change its runlevel to be full multi-user text mode (like init 3 in RedHat). Using runlevel command, I see that am running N 2 which is Graphical multi-user ...
1
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1answer
77 views

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 ...
1
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1answer
3k views

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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2answers
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 ...
1
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1answer
186 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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1answer
15k views

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 ...
1
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1answer
216 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 ...
1
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1answer
1k views

systemd and non-existent *.service files: Are they generic?

systemd units are stored in /lib/systemd/system such as: rsync.service avahi-daemon.socket bluetooth.service cups.service When you use the following command: systemctl enable name Replace name ...
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0answers
106 views

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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0answers
362 views

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 ...