How to find port number in windows 10

The state of a port is either open, filtered, closed, or unfiltered. A port is said to be open if an application on the target machine is listening for connections/packets on that port.

In this article, we will explain four ways to check open ports and also will show you how to find which application is listening on what port in Linux.

1.

Using Netstat 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:

$ sudo netstat -ltup

The flag tells netstat to print all listening sockets, shows all TCP connections, displays all UDP connections and enables printing of application/program name listening on the port.

To print numeric values rather than service names, add the flag.

$ sudo netstat -lntup

You can also use grep command to find out which application is listening on a particular port, for example.

$ sudo netstat -lntup | grep "nginx"

Alternatively, you can specify the port and find the application bound to, as shown.

$ sudo netstat -lntup | grep ":80"

2.

Using ss

how to check port in unix

how to find port in linux