A command I often use for a nice overview of running stuff: $ netstat --numeric-ports -elp46 | sort Active Internet connections (only servers) Proto

A command I often use for a nice overview of running stuff: $ netstat --numeric-ports -elp46 | sort Active Internet connections (only servers) Proto Recv-Q Send-Q Local Address Foreign Address State User Inode PID/Program name tcp 0 0 0.0.0.0:22223 0.0.0.0:* LISTEN root 12159 3370/sshd tcp 0 0 0.0.0.0:3000 0.0.0.0:* LISTEN root 781140 4940/nginx -g daemo tcp 0 0 0.0.0.0:4000 0.0.0.0:* LISTEN postgres 780857 4916/postgrest tcp 0 0 127.0.0.1:25 0.0.0.0:* LISTEN root 13126 3537/master tcp 0 0 127.0.0.1:5432 0.0.0.0:* LISTEN postgres 12526 3406/postgres tcp6 0 0 ::1:5432 :::* LISTEN postgres 12525 3406/postgres tcp6 0 0 :::22223 :::* LISTEN root 12168 3370/sshd udp 0 0 0.0.0.0:123 0.0.0.0:* root 12479 3400/ntpd udp 0 0 127.0.0.1:123 0.0.0.0:* root 12485 3400/ntpd udp6 0 0 ::1:123 :::* root 12487 3400/ntpd udp6 0 0 :::123 :::* root 12480 3400/ntpd