How do I find out what network services are running or listing under Linux?

in Categories , last updated February 20, 2008

Q. How do I find out what network service are running under Linux operating system?

A. For security reason it is necessary to find out what services are running. With the help of netstat command, you can print information about the Linux networking subsystem including running services. It can display program name and PID for each socket belongs to. Use netstat as follows:

$ netstat -atup

OR

$ netstat -atup | grep LISTEN

Where,

  • -t : Select all TCP services
  • -u : Select all UDP services
  • -a : Display all listening and non-listening sockets.
  • -p : Display the PID and name of the program to which each socket belongs

Posted by: Vivek Gite

The author is the creator of nixCraft and a seasoned sysadmin, DevOps engineer, and a trainer for the Linux operating system/Unix shell scripting. Get the latest tutorials on SysAdmin, Linux/Unix and open source topics via RSS/XML feed or weekly email newsletter.

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