IT Toolbox
IT Toolbox

List listening ports on Linux

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Linux Low risk Administrator required

List listening ports on Linux

Displays the TCP and UDP listening as well as associated processes.

Command / script 
sudo ss -tulpn

When should you use it?

Use this to confirm that a service is listening on the expected port and interface.

What the script does

  • t and u select TCP and UDP.
  • l limits the output to listening sockets.
  • p shows the process and n prevents name resolution.

Precautions

  • sudo may ask for the administrator password.

Rollback

No changes are made.

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