ROS

Raspbian Strech Image w/ ROS and OpenCV

Use dd if="location-of-rosbots-info-file.img" of="/dev/xyz" to install the image to SD card. This might take a while and there probably won't be any output until it's done
Add a file named "ssh" to the boot partition after the above installation completes
Boot up like the instructions say
To connect to the pi, use an ethernet cable. On Ubuntu, click on the wifi icon and click Edit Connections.... Find the Wired Connection and edit it. Change the IPv4 setting from Automatic (DHCP) to Shared to other computers.
Next, we need to find the IP address. Do this by running the arp command on Ubuntu (install if needed).
Follow the link's instructions from step 6 onwards