tldr/pages/linux/ss.md

ss

Utility to investigate sockets.

• Show all TCP/UDP/RAW/UNIX sockets:

ss -a {{-t|-u|-w|-x}}

• Filter TCP sockets by states, only/exclude:

ss {{state/exclude}} {{bucket/big/connected/synchronized/...}}

• Show all TCP sockets connected to the local HTTPS port (443):

ss -t src :{{443}}

• Show all TCP sockets listening on the local 8080 port:

ss -lt src :{{8080}}

• Show all TCP sockets along with processes connected to a remote ssh port:

ss -pt dst :{{ssh}}

• Show all UDP sockets connected on specific source and destination ports:

ss -u 'sport == :{{source_port}} and dport == :{{destination_port}}'

• Show all TCP IPv4 sockets locally connected on the subnet 192.168.0.0/16:

ss -4t src {{192.168/16}}