{"id":6618,"date":"2025-01-24T04:03:19","date_gmt":"2025-01-23T22:33:19","guid":{"rendered":"https:\/\/www.veeble.com\/kb\/?p=6618"},"modified":"2025-04-01T12:39:07","modified_gmt":"2025-04-01T07:09:07","slug":"how-to-find-the-process-which-uses-the-port-in-linux-and-windows","status":"publish","type":"post","link":"https:\/\/www.veeble.com\/kb\/how-to-find-the-process-which-uses-the-port-in-linux-and-windows\/","title":{"rendered":"How to find the process using port in Linux and Windows?"},"content":{"rendered":"\n
\"How<\/a><\/figure>\n\n\n\n

If you’ve faced a blocked or in-use port, it can be frustrating. Fortunately, there are easy ways for Windows<\/strong> and Linux<\/strong> users to find which program or process is using a port and resolve conflicts.<\/p>\n\n\n\n

In this guide, we’ll walk you through how to find the program or process that’s using a particular port on both Windows and Linux systems, and I’ll also show you the tools available to resolve port conflicts.<\/p>\n\n\n\n

Why Knowing Which Process Uses a Port is Important?<\/h6>\n\n\n

Ports are essential for network communication, and multiple programs might attempt to use the same port, leading to conflicts. By finding which process is using a specific port, you can avoid these conflicts, ensure smooth network operations, and troubleshoot issues that arise from port usage.<\/p>\n<\/div>\n\n\n\n

<\/p>\n\n\n

Method 1: Using Command Prompt (Windows)<\/h3>\n\n\n

The Netstat utility on Windows can help you find which application is using a specific port. Here’s how you can use this method to track down which process is occupying a particular port:<\/p>\n\n\n\n

Press the Windows key, type CMD in the search box, right-click on Command Prompt, and select Run as Administrator. Then enter the command:<\/p>\n\n\n\n

netstat -aon -p tcp<\/code><\/pre>\n\n\n\n
\"\"<\/a><\/figure>\n\n\n\n
This command will display a list of all TCP connections, their local addresses, the process IDs (PIDs), and the state of each connection.<\/p>\n\n\n\n
Look through the list for the port you’re concerned about (e.g., port 135 in the above screenshot).
Find the PID number associated with that port in the last column. i.e; 1436 there.<\/p>\n\n\n\n
To match the PID with the program name, use the following command in the same Command Prompt window:<\/p>\n\n\n\n
tasklist | find \"PID_number\"<\/code><\/pre>\n\n\n\n
For example, if the PID number from the previous command was 1400, you would run: tasklist | find “1436”<\/strong><\/em><\/p>\n\n\n\n
This will show you the name of the application using that port (e.g., FileZilla Server, SQL Server, etc.).<\/p>\n\n\n\n
\""tasklist<\/a><\/figure>\n\n\n\n
<\/p>\n\n\n
Method 2: Using Resource Monitor (Windows)<\/h3>\n\n\n
If you prefer a more visual approach, Windows’ Resource Monitor tool<\/a> can provide a detailed view of the programs using specific ports.<\/p>\n\n\n\n
    \n
  1. Press the Windows key and type resource monitor<\/strong> or resmon<\/strong> in the search box. Click on Resource Monitor to open the tool.<\/li>\n\n\n\n
  2. In Resource Monitor, navigate to the Network tab.<\/li>\n<\/ol>\n\n\n\n
    In the Listening Ports section, you\u2019ll see a list of all open ports and the applications that are using them.
    You can check the PID column to match the process IDs with the applications.<\/p>\n\n\n\n
    \"Use<\/a><\/figure>\n\n\n\n
    <\/p>\n\n\n
    Method 3: Command Line on Linux<\/h3>\n\n\n
    If you\u2019re using Linux, the process is quite similar, but instead of Command Prompt, you\u2019ll use the Terminal to run the necessary commands.<\/p>\n\n\n\n
      \n
    1. Open a terminal on your Linux machine.<\/li>\n\n\n\n
    2. Enter the following NetStat command to get a list of active connections:<\/li>\n<\/ol>\n\n\n\n
      sudo netstat -ano -p tcp<\/code><\/pre>\n\n\n\n
      This will show all TCP connections with their corresponding PIDs.<\/p>\n\n\n\n
      \"command:<\/a><\/figure>\n\n\n\n
      Similar to Windows, locate the specific port number and note the associated PID.<\/p>\n\n\n\n
      Once you have the PID, you can use the following command to find more details about the process:<\/p>\n\n\n\n
      ps -ef | grep<\/code><\/pre>\n\n\n\n
      This will display the program name and other details related to the process ID.<\/p>\n\n\n\n
      <\/p>\n\n\n
      Additional Tips:<\/h3>\n\n
      How to Interpret the netstat Command:<\/h6>\n\n\n
      You can customize the netstat<\/a> command with different flags to refine the results:<\/p>\n\n\n\n
      -a<\/td>Displays all active connections and listening ports.<\/td><\/tr>
      -n<\/td>Shows addresses and port numbers in numerical form (instead of resolving them to hostnames).<\/td><\/tr>
      -o<\/td>Displays the PID associated with each connection.<\/td><\/tr>
      -p<\/td>Displays the protocol (TCP, UDP, etc.).<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
      <\/p>\n\n\n
      Task Manager PID Column:<\/h6>\n\n\n
      If you’re using Windows Task Manager to match a PID, ensure the PID column is visible. To do this, click on the View menu, select Select Columns, and check the box for PID (Process Identifier).<\/p>\n\n\n\n
      <\/div><\/div>\n\n\n\n
      Knowing which application is using a port is essential for troubleshooting network and application conflicts. By following the methods above, you can easily find which program or process is using a particular port on both Windows and Linux systems. Whether you prefer using the command line or a graphical interface, there are plenty of ways to resolve port conflicts efficiently.<\/p>\n\n\n\n
      <\/div>\n\n\n\n
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      <\/div>\n\n\n\n
      Related Blogs:<\/strong><\/p>\n\n\n\n
      \n
      How to Open a Specific Port on Linux<\/a><\/blockquote>