How to connect to RPi via SSH

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What is SSH?

SSH is a way to remotely send command line commands to the Raspberry Pi over a secure connection. This enables the user to control their RPi without having it hooked up to a monitor and a keyboard. This article describes a process on an RPi board with PrusaLink installed. 

To connect to the RPi board remotely, you will need a computer with a working SSH client, like PuTTY but most operating systems usually have SSH already integrated into their terminal.

How to enable SSH on the RPi with PrusaLink?

SSH can be enabled while setting up an SD card with PrusaLink image as described in the Prusalink for MK3/S/+ guide. You have to also set a device username + password. Note these credentials are different than your PrusaLink credentials or the Prusa Account.

To enable SSH on RPi with PrusaLink already installed and running, you have to connect the microSD card into a PC or a MAC and put a file named "ssh" without a file extension into the boot partition of the SD card. (A typical raspi SD has two partitions, "boot" and "root", although only the "boot" is accessible from Windows and Mac operating systems. To access the "root" partition, you have to use Linux or another similar Unix-based operating system.
Once the file is on there, safely remove the SD, put it back into the RPi and boot it up. You can now connect to your RPi by typing "ssh jo@<IP_ADDRESS>" into the commandline (replace "<IP_ADDRESS>" for the RPi's ip address). The default password is "raspberry", same as on every RPi. Only the username has been changed from "pi" to "jo" on PrusaLink.