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VIEW systemd INFORMATION
systemctl list-dependencies
Show a unit’s dependencies
systemctl list-sockets
List sockets and what activates
systemctl list-jobs
View active systemd jobs
systemctl list-unit-files
See unit files and their states
systemctl list-units
Show if units are loaded/active
systemctl get-default
List default target (like run level)
WORKING WITH SERVICES
systemctl stop service
Stop a running service
systemctl start service
Start a service
systemctl restart service
Restart a running service
systemctl reload service
Reload all config files in service
systemctl status service
See if service is running/enabled
systemctl enable service
Enable a service to start on boot
systemctl disable service
Disable service--won’t start at boot
systemctl show service
Show properties of a service (or other unit)
systemctl –H host status network
Run any systemctl command remotely
CHANGING SYSTEM STATES
systemctl reboot
Reboot the system (reboot.target)
systemctl poweroff
Power off the system (poweroff.target)
systemctl emergency
Put in emergency mode (emergency.target)
systemctl default
Back to default target (multi-user.target)
VIEWING LOG MESSAGES
journalctl
Show all collected log messages
journalctl -u network.service
See network service messages
journalctl -f
Follow messages as they appear
journalctl -k
Show only kernel messages
USING UNIT FILES
Besides services, most systemd commands can work with these unit types:
paths,slices,snapshots,sockets,swaps,targets, and timers
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