Code4IT Notes

Short tips, useful for quick access.

How to find the process that is bound to a Port?


If you have the port 1313 used by a process, and you want to kill that process to free up that port, you can follow these steps.

Depending on the machine and the shell, there are different ways.

PowerShell or Cmd on Windows

Using PowerShell on Windows, use the netstat command to get the network info, and filter the result via findstr:

netstat -ano | findstr :1313

netstat accepts different flags:

  • -a: Displays all connections and listening ports;
  • -n: Displays addresses and port numbers in numerical form.
  • -o: Displays the owning process ID associated with each connection.

It returns all the network info:

Netstat shows info about the network connections

Then you can filter the result with findstr by specifying the text to be searched:

Findstr can be used to filter cmd results

Now, locate the Process ID (PID). In this case, it’s 74720.

Linux shell

Similarly, netstat works on Linux. But with different flags.

  • -l: display listening server sockets;
  • -t: filter by connection of type TCP;
  • -p: display PID/Program name for sockets;
  • -n: don’t resolve names (Show IP instead of Host Name);

So, run:

netstat -ltnp

Netstat on Linux

And, to filter the result, use the grep command:

netstat -ltnp | grep :1313

And then locate the port.

External references

🔗 How to Kill a Process Running on a Port