SSH is a great way to gain remote access to your computer. When you open the ports on your router (port 22 to be exact) you can not only access your SSH server from within your local network, but from anywhere in the world. However, you don't want to risk using a weak password for authentication. Luckily, it's very easy to set up your global SSH server in a very secure manner by using key-based authentication and disabling password authentication on your server altogether.
Read full article: How To Authenticate Over SSH With Keys Instead of Passwords
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