2025-01-22
Program for inspecting network connections and socket statistics.
| Command | Description | Example |
|---|---|---|
ss |
Show summary of socket statistics and connections. | ss |
ss -t |
Display TCP sockets. | ss -t |
ss -u |
Display UDP sockets. | ss -u |
ss -l |
Display listening sockets (services waiting for incoming connections). | ss -l |
ss -a |
Display all sockets (both listening and non-listening). | ss -a |
ss -n |
Show numerical addresses and ports instead of resolving hostnames and service names. | ss -n |
ss -p |
Show the process using the socket. | ss -p |
ss -s |
Display socket statistics summary. | ss -s |
ss -r |
Display resolved hostnames and services for the connections. | ss -r |
ss -o state established |
Show sockets in the “ESTABLISHED” state. | ss -o state established |
ss -4 |
Show only IPv4 sockets. | ss -4 |
ss -6 |
Show only IPv6 sockets. | ss -6 |
ss -H |
Hide column headers in the output. | ss -H |
ss -i |
Show internal socket information (e.g., timers, retransmissions). | ss -i |