Questions tagged [runlevel]

The term runlevel refers to a mode of operation in one of the computer operating systems that implement Unix System V-style initialization

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Avoid exit mode when a partition is not mounted

Everytime a HDD partition is not mounted with /etc/fstab due to errors, system halts on emergency mode. I want my server auto check itself using fsck on emergency mode or avoid the emergency mode when ...
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How to turn gvfs and other user services off while temporarily not using graphical.target?

If I use a desktop installation of Ubuntu 20.04 (for example the standard Hyper-V image promoted by Windows) I can easily turn the graphical components off, by switching the default boot target from ...
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runlevel change 18.04 and 20.04

Environment I'm using ubuntus inside hyper-v, (two 20.04 and two 18.04) I want to change the run level on all OS. I don't need graphical because I'm using mobaXterm for ssh config. And without ...
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Ubuntu 20.04 hangs on reboot to runlevel 3 [duplicate]

I'm helplessly trying to boot my machine to runlevel=3. Whether adding ad-hoc via editing command line during grub session or offline, via updating /etc/default/grub: GRUB_CMDLINE_LINUX_DEFAULT="...
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1answer
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Rescue mode (rescue.target) and Emergency mode (emergency.target) descriptions

I can't find descriptions of Rescue mode(rescue.target) and Emergency mode(emergency.target) where it would be stated what's started and what's not in each mode. Some info I find on the web is ...
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1answer
368 views

Does Reboot command invoke scripts in /etc/rc0.d/ directory?

I need to kill some services when shutdown/reboot my Linux server, but I am not sure how Reboot command works. To my understanding, /etc/rc0.d/ scripts will be invoked when system is shutdown, while ...
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2answers
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how to setup default runlevel to 3 after preseed install ubuntu 16.04

how to setup default runlevel to 3 after preseed install ubuntu 16.04 I install an os ubuntu 16.04 with preseed.cfg on boot get stuck boot stuck on /dev/sda1 clean it seems the same question even ...
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1answer
110 views

How to prevent systemd from starting services that have RequriedBy on a particular service and/or target

I am trying to write a simple service that just checks if a USB device is connected. Below,is the unit file's content for the service: cat /etc/systemd/system/check-usb.service [Unit] Description=...
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1answer
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“Asking for cache data failed” and “Assuming drive cache: write through” messages after that Ubuntu boot failed

Today I was using my (old) Compaq laptop where Lubuntu is regularly installed on a partition. Suddenly, it stopped to respond to any inputs, so I (wrongly?) decided to restart the system. After the ...
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Is it possible to add new runlevel in initd or systemd?

Can I add a new runlevel to initd/systemd? These are the default runlevels in Slackware: 0 = halt 1 = single user mode 2 = unused (but configured the same as runlevel 3) 3 = multiuser mode (default ...
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why my script in /etc/init.d with K symbolic link in rc0.d and rc6.d and S symbolic link in rc5.d is not working on shutdown?

I'm writing a script which I want to run before every shutdown of my ubuntu system. I have placed my script named myscript inside /etc/init.d folder and then created symbolic links in rc0.d and rc6.d ...
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How can I find the runlevel of the processes of /etc/init.d?

I want to find out in which runlevel the files of /etc/init.d‍ are started. Has someone any idea? I thought there might be the option to find it with the find command
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Can't switch to multi-user.target on Ubuntu 16.04.3 Desktop

Previously on multiple boxes with Ubuntu 16.04 running I've been using sudo systemctl isolate multi-user.target to go into CLI from the graphical.target mode. Or I have been using sudo systemctl ...
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1answer
941 views

runlevel is return unknown in teminal

I put in my terminal command: $ runlevel and it return me instead some: init num just: unknown I use Ubuntu 17.10
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Secure way to launch lightdm/xorg/xfree86 from console startup

If I launch Ubuntu in console mode, i.e.: cat /proc/cmdline BOOT_IMAGE=/vmlinuz-4.10.0-33-generic.efi.signed root=/dev/mapper/ubuntu--vg-root ro text And then issuing the remaining commands ...
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1answer
325 views

When are nohup'd processes stopped during shutdown?

When I shutdown Ubuntu after I started a process using nohup, when and how is it getting stopped? One of the scripts in /etc/rc0.d/ should handle it, shouldn't? Is it S20sendsigs?
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1answer
115 views

Is the Linux system in one runlevel after bootup or does it go from one runlevel to another during the process of bootup?

Is the Linux system in one runlevel after bootup or does it go from one runlevel to another during the process of bootup? This means that when we power on the cpu, and the default run level mentioned ...
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1answer
198 views

Can LIB paths be set in rc.local? Does it execute its commands after we login?

Does rc.local execute its commands after we login? Since rc.local executes its commands after the multi user runlevel completes, does it also mean that we can/should set LIB paths in it instead of ...
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How can I simply change into a text mode runlevel under systemd?

I have got ubuntu 16.04 installed with the systemd. I need to install a cuda toolkit from nvidia, but I can only install it from runlevel 3. Now I have found some answers here, but none of them ...
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What init 1 command exactly does?

Well to be honest I love finding Loopholes in everything, I was watching a TV Serial Mr Robot and at some point a character mentioned init 1 command, that her computer started crashing again and again ...
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1answer
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Set runlevel… not working out as promised [duplicate]

I'm trying to install a driver for my graphics card in Ubuntu 16.04, and the instructions caution me that first I should set a runlevel that prevents X from starting. That's proving difficult. The ...
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914 views

Execute a Script before shutting down

I'm trying to execute a script before shutdown of a Ubuntu 16.04 machine. Here is the process I did: Created a script in /etc/init.d ( touch /etc/init.d/sample ) Given execute permission ( chmod a+x ...
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1answer
2k views

Full Disk Encryption - How to boot in as runlevel 1?

So we have some remote workers who are required to have full disk encryption by policy. Recently I had an issue where someone removed the administrator privileges such that no administrators were ...
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1answer
2k views

Set nginx init script to never run automatically on startup

I just installed nginx on Ubuntu 16.04. The trouble is, I only want to start it manually, never automatically on runlevel. I found lots of entries about how to get it to run on different runlevels, ...
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1answer
256 views

Ubuntu startup run level

How do I make Ubuntu 12.04 to start at a runlevel other than default 2.although I could change run level after starting from terminal it does not remain when I restart
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1answer
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How do I change the runlevel on systemd?

Pretty simple, I am trying to change the runlevel. Everything I find online points me to the file located in: /etc/init/rc-sysinit.conf Here I have tried changing the "DEFAULT_RUNLEVEL" to 3 or ...
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0answers
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Ensure that a (potentially long) root script execute to completion before power-down [duplicate]

I want to run a simple rsync-based bash script as root when a power-down cycle initiates from either: a login interactive shell, or a gui session, or a machine boot state where no login-user has ...
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What run level activates on reboot, shutdown, and start?

I'm trying to get a better understanding of run levels and things. I have created two scripts in /etc/ one is called cinit and the other cdinit. The scripts stand for "custom initialize" ...
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1answer
88 views

runlevel mismatch

i am exploring the runlevel of ubuntu system, when i run runlevel, to display the current runlevel, i got: N 5 but inside the /etc/init/rc-sysinit.conf: env DEFAULT_RUNLEVEL=2 why default ...
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1answer
11k views

Warning default start runlevel arguments do not match Default-Start values

I tried to add Fuseki as a service to the correct runlevels using update-rc.d. I used sudo update-rc.d fuseki defaults and I think is okay now, but I got this warnings: update-rc.d: warning: default ...
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LSB warnings in systemd 15.10

a get warnings by using a disable/enable systemd commands: $ sudo systemctl enable mongodb.service Synchronizing state of mongodb.service with SysV init with /lib/systemd/systemd-sysv-install... ...
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1answer
747 views

no difference between runlevel 3 and 5 in ubuntu 15.04

From the exercises in chapter 3 from Introduction to Linux: Which services run in graphical mode that don't run in text mode? So I tried: diff <(ls -l rc3.d/) <(ls -l rc5.d/) Ran in the ...
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1answer
1k views

NetworkManager does not start automatically

I used this QUESTION to configure the default of Ubuntu 14.10 to start in RUNLEVEL 1 but when I switch to another RUNLEVEL (2,3,or 5) , there is no network connection and I have to start the ...
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1answer
31k views

How to set default runlevel?

I would like to know how to set a default runlevel? This is to ensure that my computer directly boots at the set level .
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1answer
363 views

Why am i in run level 2 but i can still see my GUI? [duplicate]

I am a newbie in linux using ubuntu 14.04. I came across the concept of runlevels. What confuses me is the fact that when i run the command who -r I see that i am in runlevel 2 which represents ...
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1answer
605 views

Runlevel 0 script not running properly on shutdown

I have a basic script where all it does is delete a specific user on shutdown. I made it executable and created a symlink to /etc/rc0.d/K99deleteuser so that it would actually run on shutdown. ...
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3answers
662 views

Shutdown my system in 30 minutes with telinit

If I want to shutdown my system in 30 minutes with telinit, how could I do it? I know that with shutdown is easier but just for knowing it.
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100 views

lubuntu change default runlevel [duplicate]

How can I change the default runlevel in Lubuntu 14.04? Some say by changing the inittab file but, I can't find any /etc/inittab file in my computer.
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1answer
2k views

Add a grub menu entry that boots into my current install but with a different runlevel

I am running the latest Kubuntu (14.10) and would like to add a grub2 menu entry that allows me to boot straight into a different runlevel? I would like to modify /etc/rc3.d or /etc/rc4.d to boot ...
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213 views

When will “runlevel” event be emitted?

start on runlevel [2345] referring this: The syntax of start on stanza is: start on EVENT [[KEY=]VALUE]... [and|or...] It means, runlevel is en event, [2345] is that event's environment variables'...
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1answer
588 views

edited rc-sysinit.conf system won't boot [duplicate]

I have modified the DEFAULT_RUNLEVEL from 2 (graphical interface) to 1 in rc-sysinit.conf, to install drivers for GPU. After choosing either default or recovery mode, I see just black screen. Any ...
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1answer
2k 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). From this command runlevel i see that am running N 2 which is Graphical multi-...
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April 2014 update taken, bootup hangs at Stopping System V runlevel compatibility

I've seen other threads related to my current situation, but the solutions posted didn't help... After accepting updates this morning, my system halts at "Stopping System V runlevel compatibility" ...
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1answer
256 views

which file in ubuntu defines meaning of each run level?

In redhat based linux, there is a file called inittab in which you can see the meaning and definition of each run level. Is there any file like this in Ubuntu? I know what each run level means in ...
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Editing/changing runlevels?

I learned linux on redhat/fedora systems, and I really like there runlevels. The runlevels in ubuntu (inherited from debian i'm sure) are weird, there is no way to get a no GUI environment unless your ...
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1answer
1k views

What is the order of execution of the scripts at /etc/rc0…6.d/?

The scripts linked at /etc/rc0...6.d/ have numbers at the begining right after the letter S/K, so the question is what is order of execution? From the lower to higher or higher to lower? I also would ...
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1answer
196 views

Why does the run level change automatically?

I am trying set up a virtual machine as an exercise for my friend, it came to my mind that I can give him a machine that reboots all the time and ask him to find out whats wrong with it. I change run ...
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1answer
686 views

runlevel misunderstanding

As I known there is no classical init in ubuntu, instead of init ubuntu uses upstart. Upstart is capable of fully simulation of classical init. The problem is I still don't understand how upstart ...
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2answers
3k views

run levels only at start up

I find the concept of runlevels very confusing. Currently, I'm trying to run a script only at start up. But configuring as shown below leads to it working also at halt time. I'm programming a daemon ...
2
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1answer
389 views

Reboot ubuntu without a complete hardware reboot

I would like to reboot the OS as if it is pulled up from GRUB, but without actually rebooting the entire computer. This is because this machine has a bunch of different OSes on it and while a reboot ...