UBUNTU 16.04

Option 1:

sudo apt-get install -y r-base r-base-dev libcurl4-openssl-dev libssl-dev build-essential

Option 2 (to get newer R version):

with PPA. ref digitalocean

apt install apt-transport-https

sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys E298A3A825C0D65DFD57CBB65171......