TOOL » LINUX » SYSTEMCTL

Service

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Reference:linuxhandbook.com
Man page:systemctl

Usage ​

There are user and system services. If dealing with system services, root privileges are needed.

shell
systemctl OPTION ACTION my.service
OptionDescription
--userUse the user service manager.
ActionDescription
startStart the service.
stopStop the service.
restartRestart the service.
enableEnable automatic service startup on boot.
disableDisable automatic service startup on boot.

Creation ​

After any changes to a service, run:

shell
systemctl --user daemon-reload
ScopePath
System/etc/systemd/system
User~/.config/systemd/user

System service ​

ini
# something.service
[Unit]
Description=some service
Wants=network-online.target
After=network-online.target

[Service]
Type=oneshot
User=mateus
Environment=DISPLAY=:0
EnvironmentFile=/etc/someservice/someservice.conf
ExecStart=/path/to/script.py

[Install]
WantedBy=multi-user.target

User service ​

notify service (Replace {HOME} with your home directory):

ini
# caddy.service
[Unit]
Description=Caddy web server
Documentation=https://caddyserver.com/docs/
After=network.target

[Service]
Type=notify
ExecStartPre=/usr/bin/caddy validate --config {HOME}/.local/server/Caddyfile
ExecStart=/usr/bin/caddy run --config {HOME}/.local/server/Caddyfile
ExecReload=/usr/bin/caddy reload --config {HOME}/.local/server/Caddyfile --force
Restart=on-abnormal
TimeoutStopSec=5s

[Install]
WantedBy=default.target

oneshot service (when using a timer):

ini
[Unit]
Description=clear old trash files

[Service]
Type=oneshot
ExecStart=trash-empty 7