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Ss

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Man page:ss

Usage

Utility to investigate sockets.

shell

ss OPTIONS

Option	Description
`-t` `--tcp`	Display TCP sockets.
`-l` `--listening`	Display only listening sockets (omitted by default).
`-n` `--numeric`	Do not try to resolve service names.
`-p` `--processes`	Show process using socket.

Show currently used ports with process info:

shell

ss -tlnp