sudo raspi-config configuration code example
Example 1: sudo raspi config
sudo raspi-config
Example 2: 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