Mac Shortcuts

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A handy collection of essential macOS keyboard shortcuts and productivity tips to help us navigate faster, manage windows, take screenshots, and boost efficiency.

1. Stop a specific port

To stop a specific port (e.g., port 2121) on a Mac, we can use the lsof command to find the processes that are using that port and then terminate those processes. Here are the steps:

1. Open Terminal, which we can find in the Utilities folder within the Applications folder.

2. Use the following command to find which process is using port 2121:

   lsof -i :2121

   This command will list the processes that are using port 2121.

3. Once we've identified the process, we can use the kill command to stop it. For example, if the process ID (PID) is 12345, we can use the following command to stop it:

   kill 12345

   Replace "12345" with the actual PID of the process using port 2121.

After terminating the process using the port, port 2121 will no longer be in use.