cd /home/pi
mkdir noip
cd noip
wget https://www.noip.com/client/linux/noip-duc-linux.tar.gz
tar -zxvf noip-duc-linux.tar.gz
cd noip-2.1.9-1
sudo make
sudo make install
#when asked set interval as 30 (minutes) - or 60.
#keep in mind that if your ip changes it can take up to this amount of time until it updates