Oserror Errno 98 address already in use

1. What is Oserror Errno 98 address already in use?
2. What is address already in use in Unix?

What is Oserror Errno 98 address already in use?

The oserror errno 98 occurs because another application on your system is using the port number that the current application wants to use. Or, an instance of the same program is using the same port, and it's running as a background process.

What is address already in use in Unix?

The Error “address already in use” occurred because some process was already running on the same port. So we can resolve the issue just by killing the process. To stop the process, we need the process ID (PID), which we can fetch using the lsof command.