Linux what is listening on port

You can also subscribe without commenting. This site uses Akismet to reduce spam. Learn how your comment data is processed. Using netstat Command netstat network statistics command is used to display information concerning network connections, routing tables, interface stats, and beyond. In case you do not have it installed by default, use the following command to install it.

If you liked this article, then do subscribe to email alerts for Linux tutorials. If you have any questions or doubts? Lastly, we have the fuser command. The fuser utility is a smart command-line tool that is used for locating processes using a socket, a file, or alternatively, a directory. It also does many things such as displaying the type of process, PID of each process, the user that owns the process. To use fuser to find out the service listening to a port, first, find out the PID of the process as shown.

Thereafter proceed and invoke the ps command to reveal the name of the service. Note that is the PID of the process that we got from the previous command.

Netstat is a widely used tool for querying information about the Linux networking subsystem. You can use it to print all open ports like this:. You can also use grep command to find out which application is listening on a particular port, for example. Nmap is a powerful and popular network exploration tool and port scanner. To install nmap on your system, use your default package manager as shown. The final tool we will cover for querying open ports is lsof command , which is used to list open files in Linux.

To list all Internet and network files, use the -i option. Note that this command shows a mix of service names and numeric ports. To find which application is listening on a particular port, run lsof in this form.

Use this option twice for maximum detail. These are omitted by default. With the --interfaces option, show interfaces that are not marked -f Print routing information from the FIB. This is the default. In this specific knowledgebase, we'll discuss figuring out whether a standard Apache web server is up and running on ports 80 and Let's first ensure that apache is actually running. In the above listed options we'll want to pay close attention to a couple options specifically.