# ss "Socket statistics" (ss) is a [[netstat]]-like tool with slightly nicer formatting. Options: - `-t` - Display [[TCP]] sockets - `-u` - Display [[UDP]] sockets - `-l` - Display listening sockets (not just established connections) - `-p` - Show the process using the socket (broken?) - `-n` - Show raw port numbers (not named services) For example, `ss -tulpn` will produce a nice list of open ports.