how to configure raspberry pi code example

Example: raspberry pi ubuntu server raspi-config

sudo echo "deb http://archive.raspberrypi.org/debian/ jessie main" >> /etc/apt/sources.list
sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys 7FA3303E
sudo apt-get update
sudo apt-get install raspi-config