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SSH means secure shell. It helps protect connections between two devices.

I did a senior project on VNC, a remote desktop app some use on the touch, and we used SSH to secure our connection from school to home.
 
If you don't know what it is, you likely don't need it ;) .

SSH is a great tool, however can be dangerous to use if you don't know what you are doing. It is the same as opening Terminal on your Mac (if you own a mac), however SSH is used to open a terminal on a separate computer or device.

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