to enable: update-rc.d couchdb defaults to disable update-rc.d -f couchdb remove How to Enable or Disable Services in Ubuntu Systemd/Upstart Updated September 1, 2020 by Jamie Arthur Categories Linux Howto Often, there is a need to enable or disable services temporarily or permanently on our Ubuntu system. Sometimes, we may require certain services to start up automatically on boot up e.g ssh or web servers and sometimes we may need to disable services we no longer require and are hogging the CPU and RAM. In this tutorial, we take a look at how we can enable and disable services on Ubuntu. To do this, we must first understand that there are 3 main init systems for Ubuntu Systemd Upstart SysV Each init system has a different way of starting and stopping services. We'll take a look at each one of these. How to enable and disable services in Systemd init To start a service in systemd run the command as shown: systemctl start service-name For example, to start apache web service, run systemctl start apache2 To verify that the service is running, run systemctl status apache2 Output ● apache2.service - LSB: Apache2 web server Loaded: loaded (/etc/init.d/apache2; bad; vendor preset: enabled) Drop-In: /lib/systemd/system/apache2.service.d └─apache2-systemd.conf Active: active (running) since Thu 2018-03-15 17:09:05 UTC; 35s ago Docs: man:systemd-sysv-generator(8) CGroup: /system.slice/apache2.service ├─2499 /usr/sbin/apache2 -k start ├─2502 /usr/sbin/apache2 -k start └─2503 /usr/sbin/apache2 -k start Mar 15 17:09:04 ip-172-31-41-251 systemd[1]: Starting LSB: Apache2 web server... Mar 15 17:09:04 ip-172-31-41-251 apache2[2475]: * Starting Apache httpd web ser Mar 15 17:09:05 ip-172-31-41-251 apache2[2475]: * Mar 15 17:09:05 ip-172-31-41-251 systemd[1]: Started LSB: Apache2 web server. To stop the service running service systemctl stop apache2 To confirm that the service is not running, run systemctl status apache2 Output ● apache2.service - LSB: Apache2 web server Loaded: loaded (/etc/init.d/apache2; bad; vendor preset: enabled) Drop-In: /lib/systemd/system/apache2.service.d └─apache2-systemd.conf Active: inactive (dead) since Thu 2018-03-15 17:19:47 UTC; 12s ago Docs: man:systemd-sysv-generator(8) Process: 2822 ExecStop=/etc/init.d/apache2 stop (code=exited, status=0/SUCCESS Process: 2687 ExecStart=/etc/init.d/apache2 start (code=exited, status=0/SUCCE Mar 15 17:10:11 ip-172-31-41-251 systemd[1]: Starting LSB: Apache2 web server... Mar 15 17:10:11 ip-172-31-41-251 apache2[2687]: * Starting Apache httpd web ser Mar 15 17:10:12 ip-172-31-41-251 apache2[2687]: * Mar 15 17:10:12 ip-172-31-41-251 systemd[1]: Started LSB: Apache2 web server. Mar 15 17:19:46 ip-172-31-41-251 systemd[1]: Stopping LSB: Apache2 web server... Mar 15 17:19:46 ip-172-31-41-251 apache2[2822]: * Stopping Apache httpd web ser Mar 15 17:19:47 ip-172-31-41-251 apache2[2822]: * Mar 15 17:19:47 ip-172-31-41-251 systemd[1]: Stopped LSB: Apache2 web server. To enable apache2 service on boot up run systemctl enable apache2 To disable apache2 service on boot up run systemctl disable apache2 To restart the service systemctl restart apache2 To check whether the service is currently configured to start on the next boot up systemctl is-enabled apache2 Output Executing /lib/systemd/systemd-sysv-install is-enabled apache2 enabled To check whether the service is active systemctl is-active apache2 Output active How to remove Systemd services completely What if you installed a package, and later on decide that you don't need it anymore. How do you go about removing it completely? Follow the commands below. First, stop the service systemctl stop service-name Then disable the service systemctl disable service-name Removing the service in systemd rm /etc/systemd/system/service-name rm /etc/systemd/system/service-name/[related symlinks] Reload systemd systemctl daemon-reload Finally run, systemctl reset-failed How to enable and disable services in Upstart init Upstart init system was unveiled just before systemd It was used in Ubuntu 9.10 to Ubuntu 14.10. It was later phased out paving way for systemd init in Ubuntu 15.04 and newer versions. In this example, let's see how we can start and stop, enable and disable services in Ubuntu 14.04. Upstart makes use of config files for controlling services. These files are held under the /etc/init directory. These files are made up of plain text sections organized in stanzas and each stanza describes a service and how it works. To check whether a service is running or not run the command below initctl status service-name OR service service-name status OR status service-name In this example, we'll check the status of cups, a Linux print server. initctl status cups OR service cups status OR status cups Output cups start/running, process 3029 To stop the service run the command below initctl stop cups OR service cups stop OR stop cups Output cups stop/waiting To enable a service in Upstart init In /etc/init/*.conf file, you'll find the "respawn" directive which jump-starts a service should it crash unexpectedly or should the system reboot. Its normally enabled by default. For example , in /etc/init/cups.conf file below, enable and disable services in ubuntu the first argument (3) is the number of attempts it will try to restart and the second argument (12) is the time interval between retries. If it fails to restart automictically. it will be kept in a stopped state. To disable a service in upstart init run the command below echo manual >> /etc/init/service.override This creates an override file that disables a service without altering the job definition at all. For cups service, the command will be echo manual >> /etc/init/cups.override Upon a reboot of the system, cups will be in a stopped state. If you wish to re-enable the service, you must delete the /etc/init/cups.override file. Sysv-rc-conf tool This is a text-based console that gives you an overview of different service and runlevels they are scheduled to start. It can be installed using the following command apt-get install sysv-rc-conf To execute the tool, run sysv-rc-conf

https://linoxide.com/linux-how-to/enable-disable-services-ubuntu-systemd-upstart/

in newer versions of debians you maybe need to use: to disable: systemctl disable couchdb to enable: systemctl enable couchdb 04.03.21

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