Question

119

Where are the systemd units/services located in Ubuntu?

rated 0 times [ 119] [ 0] / answers: 1 / hits: 283551 / 2 Years ago, sun, september 26, 2021, 5:58:12

I keep finding, while googling, that they're located at /usr/lib/systemd/system/ and /etc/systemd/system/. However, in my ubuntu, the first doesn't even exist, and the other has only a few services

bluetooth.target.wants                      default.target.wants           hybrid-sleep.target.wants    shutdown.target.wants

dbus-org.bluez.service                      display-manager.service        multi-user.target.wants      sockets.target.wants

dbus-org.freedesktop.Avahi.service          display-manager.service.wants  network-online.target.wants  suspend.target.wants

dbus-org.freedesktop.ModemManager1.service  getty.target.wants             paths.target.wants           sysinit.target.wants

dbus-org.freedesktop.nm-dispatcher.service  graphical.target.wants         plexmediaserver.service      syslog.service

dbus-org.freedesktop.thermald.service       hibernate.target.wants         printer.target.wants         timers.target.wants

Where are the others?

When I run systemctl list-units I see so many services but I don't know where to locate them. For example, where is my plexmediaserver.service? I need to know because that's where I want to put my other units.

Answers

Only authorized users can answer the question. Please sign in first, or register a free account.

ippalogu

Add To Favorites

Follow

Total Points: 215

Total Questions: 127

Total Answers: 146

Location: Denmark

Member since Tue, Jul 19, 2022

1 Year ago

answered 2 Years ago howesale · Accepted Answer

The package-provided service files are all usually located in /lib/systemd/system. For example, search for .service in the package index.

From man systemd.unit:

/etc/systemd/system/*

/run/systemd/system/*

/lib/systemd/system/*

...



$XDG_CONFIG_HOME/systemd/user/*

$HOME/.config/systemd/user/*

/etc/systemd/user/*

$XDG_RUNTIME_DIR/systemd/user/*

/run/systemd/user/*

$XDG_DATA_HOME/systemd/user/*

$HOME/.local/share/systemd/user/*

/usr/lib/systemd/user/*

The latter ones are for user sessions. IIRC Ubuntu 16.04 still uses upstart for user sessions, so those files are only applicable from after 16.04.

For a specific service, to see what systemd is reading, run systemctl status <service> or systemctl show <service>:

$ systemctl show ssh.service | grep Path

FragmentPath=/lib/systemd/system/ssh.service

DropInPaths=/etc/systemd/system/ssh.service.d/override.conf

$ systemctl status ssh.service

● ssh.service - OpenBSD Secure Shell server

   Loaded: loaded (/lib/systemd/system/ssh.service; enabled; vendor preset: enabled)

  Drop-In: /etc/systemd/system/ssh.service.d

           └─override.conf

   Active: active (running) since Thu 2017-01-26 16:06:53 JST; 21h ago

 Main PID: 948 (sshd)

   CGroup: /system.slice/ssh.service

           └─948 /usr/sbin/sshd -D