OS X is of course a variety of BSD Unix, not Linux. Often is the case where Linux commands either don't work, or don't give the same results on OS X as they do on Linux. For example, a basic netstat will give you a long list of the processes making network connections on your box. On Linux, various command line options can help you drill down from there, to get the answers to more specific queries. On OS X, those same queries don't give you the answers you're seeking. This isn't a compare and contrast article between Linux and OSX. Instead, I'm just noting various commands that can give answers to some basic questions. On OS X, for example, to get an answer to the question: "What process is running on port 50224?" we would use: sudo lsof -Pn | grep 50224 This will give you a list of everything connected to port 50224, sans any kind of headings. A much more abbreviated command that will give you essentially the same things, but with column...
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