$ sudo systemctl status ssh ● ssh.service - OpenBSD Secure Shell server Loaded: loaded (/lib/systemd/system/ssh.service; enabled; vendor preset: enabled) Active: active (running) since Fri 2021-01-01 11:30:48 KST; 10s ago Docs: man:sshd(8) man:sshd_config(5) Main PID: 1013995 (sshd) Tasks: 1 (limit: 19042) Memory: 1.3M CGroup: /system.slice/ssh.service └─1013995 sshd: /usr/sbin/sshd -D [listener]