SystemD

Actions

Enable docker service

systemctl enable docker.service

actions:

• enable/disable to enable/disable the service
• start/stop
• mask/unmask service can't/can be started by other service even if disable
• status

Example

Take a look in the directory /etc/systemd/system/multi-user.target.wants/

One Shot

Services declared as oneshot are expected to take some action and exit immediatelly

[Unit]
Description=Setup foo
#After=network.target

[Service]
Type=oneshot
ExecStart=/opt/foo/setup-foo.sh
RemainAfterExit=true
ExecStop=/opt/foo/teardown-foo.sh
StandardOutput=journal

[Install]
WantedBy=multi-user.target

Watch Logs

journalctl -f -u docker.service

List all enabled services

systemctl list-unit-files | grep enabled

List all services running

systemctl | grep running