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Systems & Data Center · Foundational

ss

A Linux socket statistics command that shows listening ports and connections, replacing netstat.

Definition

ss -tulpn lists TCP and UDP listening sockets with numeric ports and owning processes. Filters can match states, ports and addresses.

Example

ss -tlnp | grep :443 confirms which process listens on HTTPS.

Exam tip

ss is the modern replacement for netstat in Linux exams.

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