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Finding the process holding the port

Pradeep

We often come across the following error while starting our servers:

address already in use

And it’s not always super clear which process is holding the port.

There is a powerful command, lsof, in the Linux and Mac environments that comes handy.

For example, we can find which process is holding port 8080 using the following command:

lsof -i tcp:8080

The above command gives you the PID and the name of the process.

COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
xxxx 123 user1 apache

Happy coding!!!

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process
port
lsof
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