Systemctl kurz und knapp

Listing aller Services

• systemctl --type=service

Logging eines Dienstes

• journalctl -u ssh

Logging eines Dienstes fortlaufend

• journalctl -f -u ssh

Eigenen Service Unit erstellen

Service Datei

• vi /etc/systemd/system/simple-http.service

[Unit]
Description=My Miscellaneous Service
After=network.target

[Service]
Type=simple
User=xinux
WorkingDirectory=/home/xinux/share
ExecStart=/bin/python3 -m http.server
Restart=on-abort

[Install]
WantedBy=multi-user.target

Aktivieren

• systemctl daemon-reload
• systemctl enable simple-http.service
• systemctl start simple-http.service

Logs lesen

journalctl -fu simple-http

Starten eines Service

• systemctl start dienst

Stoppen eines Service

• systemctl stop dienst

Restarten eines Service

• systemctl restart dienst

Aktivieren eines Service

• systemctl enable dienst

Deaktivieren eines Service

• systemctl disable dienst

Status eines Service

• systemctl status dienst

Set Target

• systemctl -f enable multi-user.target
• systemctl -f enable graphical.target

Get Default Target

• systemctl get-default

graphical.target

Changing Target

• systemctl isolate multi-user.target

Set Default Target

• systemctl set-default multi-user.target

Show Targets

• systemctl list-units --type target

UNIT                        LOAD   ACTIVE SUB    DESCRIPTION
basic.target                loaded active active Basic System
bluetooth.target            loaded active active Bluetooth
ceph-mds.target             loaded active active ceph target allowing to start/stop all ceph-mds@.service instances at once
ceph-mon.target             loaded active active ceph target allowing to start/stop all ceph-mon@.service instances at once
...