telnet localhost 631
Trying 127.0.0.1...
telnet: connect to address
127.0.0.1: Connection refused
[antonio@fujitsu ~]$ systemctl status cups
● cups.service - CUPS Scheduler
Loaded: loaded (/usr/lib/systemd/system/cups.service; enabled; vendor preset: disabled)
Active: active (running) since Wed 2018-06-06 23:29:07 CEST; 40min ago
Docs: man:cupsd(8)
Main PID: 891 (cupsd)
Status: "Scheduler is running..."
Tasks: 2 (limit: 4296)
Memory: 16.0M
CGroup: /system.slice/cups.service
├─ 891 /usr/sbin/cupsd -l
└─2479 /usr/lib/cups/notifier/dbus dbus://