Please read the documentation and follow the instructions:
Set up the development environment:
For the group task
Download the OS image file, flash it onto the SD card and boot the brick (see OS > Getting Started )
Connect the brick to your computer (see OS > Network Connection)
Initiate manually a ssh session and change the default password (see OS > Working on the Brick)
Go into your groups template directory and run the deploy-script
See "Hello World", which means that everything works out!