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How Do I Check If a Socket Is Open Linux?

James H. Sterling • • 3 min read
How Do I Check If a Socket Is Open Linux?
Contents

How do I check if a socket is open in Linux?

To check the listening ports and applications on Linux:

  1. Open a terminal application i.e. shell prompt.
  2. Run any one of the following command on Linux to see open ports: sudo lsof -i -P -n | grep LISTEN. sudo netstat -tulpn | grep LISTEN. …
  3. For the latest version of Linux use the ss command. For example, ss -tulw.

How do you check if a socket is open?

You can also use the lsof command. lsof is a command meaning “list open files”, which is used in many Unix-like systems to report a list of all open files and the processes that opened them. Also you can use ss utility to dump sockets statistics.

James H. Sterling
Author

James H. Sterling

James Sterling reports on renewable energy developments, climate policy, ecological conservation, and green tech innovations around the globe.