systemctl

systemctl [OPTIONS] COMMANDE [SERVICE]

$ systemctl status nginx
● nginx.service - A high performance web server and a reverse proxy server
     Loaded: loaded (/lib/systemd/system/nginx.service; enabled; preset: enabled)
     Active: active (running) since Mon 2026-05-04 08:12:34 CEST; 4 days ago
       Docs: man:nginx(8)
   Main PID: 1234 (nginx)
      Tasks: 5 (limit: 4915)
     Memory: 12.4M
        CPU: 3min 21.456s
     CGroup: /system.slice/nginx.service
             ├─1234 "nginx: master process /usr/sbin/nginx"
             └─1235 "nginx: worker process"

$ sudo systemctl enable --now postgresql
Created symlink /etc/systemd/system/multi-user.target.wants/postgresql.service → /lib/systemd/system/postgresql.service.
$ systemctl is-enabled postgresql
enabled

$ systemctl list-units --type=service --state=running
UNIT                     LOAD   ACTIVE SUB     DESCRIPTION
cron.service             loaded active running Regular background program processing
networkd-dispatcher.serv loaded active running Dispatcher daemon for systemd-networkd
nginx.service            loaded active running A high performance web server
postgresql.service       loaded active running PostgreSQL RDBMS
ssh.service              loaded active running OpenBSD Secure Shell server