systemctl

systemctl is a cli to systemd. Reasonable intro.

The pager defaults to less. To disable it use --no-pager or export SYSTEMD_PAGER=.

Types of Daemons

To list the unit (daemon) types:

$ systemctl -t help
Available unit types:
service
mount
swap
socket
target
device
automount
timer
path
slice
scope

There are 3 types of daemons:

• services
• sockets
• paths

To see the system’s processes in each:

$ systemctl
$ systemctl list-units --type=service
$ systemctl list-units --type=socket --state=LOAD
$ systemctl list-units --type=path --all
$ systemctl list-unit-files

Also check out:

systemctl list-unit-files

Working with Services

Show Services

Show running services:

systemctl list-units --type=service | grep running

Start Service

Start x11vnc service:

sudo systemctl start x11vnc.service

Show Service Status

systemctl status _service-name_

Show Service Log

Use journalctl:

journalctl --no-pager -u _service-name_