Port Already in Use Error Fix  Don’t Do This With Terminal

Port Already in Use Error Fix Don’t Do This With Terminal

HomeOther ContentPort Already in Use Error Fix Don’t Do This With Terminal
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Channel Avatar WebStylePress2022-05-20 19:00:28 Thumbnail
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If you were using terminal or command prompt, closed it later on, but for some reason when you try to use it again, it says: Port 3000 is already in use (something is already running on port 3000) and then you are unable to start the app or use command that you wanted to, then this video is for you. I am using Windows, using Git for Windows for terminal program. I am using React JS app.

I will use command
npm start
This will start the app.
I can stop the app by using CTRL + C from keyboard.
I can start the app again as normal.

If I use the command again and run the app
npm start
it starts again.

If i close the terminal without stopping previous process, it says:
Port 3000 already in use
or
Something is already running on port 3000.

We can find specific port (in this case 3000) by using following command on Windows & using Git for Windows
netstat -ano | findstr :3000

We can get kill task help by using following command
taskkill /?

Then I will end process on port 3000 by using this to kill task command
taskkill -f -pid 15984
-f flag force kill the running process

We can also end running task using npx command in case of React JS or Node JS
npx kill-port 3000

You can also kill task from task manager by ending Node JS task.

So this is how you can force terminate a task running on a port. When task will be terminated, port will be free and you will be able to use that port again.

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