Running a Shell Remotely
It’s possible to log in to a Macintosh over a network—from another Mac, a Windows PC, a Linux box—and run a shell to do work. This is accomplished with software called SSH (Secure Shell) included with OS X. We saw SSH in Network Connections, but only for connecting from your Mac to remote machines. Now we’ll see how to log into your Mac from the outside world and run shells. This is a terrific feature if you don’t need the Finder or other graphical programs. Multiple users can even log in at the same time from remote locations and run shells simultaneously.
We’ll begin by covering the basics of accessing your Macintosh remotely to run shells. Afterward, we’ll discuss some roadblocks that can prevent incoming connections from working.
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