How to Install R and RStudio on Ubuntu 12.04 (Precise) for the blog https://medium.com/@GalarnykMichael/install-r-and-rstudio-on-ubuntu-12-04-14-04-16-04-b6b3107f7779#.8bwdcvjxv

RStudioUbuntu1204.sh

# Install R + RStudio on Ubuntu 12.04

sudo apt-key adv –keyserver keyserver.ubuntu.com –recv-keys E084DAB9

# Ubuntu 12.04: precise
# Ubuntu 14.04: trusty
# Ubuntu 16.04: xenial
# Basic format of next line deb https://<my.favorite.cran.mirror>/bin/linux/ubuntu <enter your ubuntu version>/
sudo add-apt-repository 'deb https://ftp.ussg.iu.edu/CRAN/bin/linux/ubuntu precise/'
sudo apt-get update
sudo apt-get install r-base
sudo apt-get install r-base-dev

# Download and Install RStudio
sudo apt-get install gdebi-core
wget https://download1.rstudio.org/rstudio-1.0.44-amd64.deb
sudo gdebi rstudio-1.0.44-amd64.deb
rm rstudio-1.0.44-amd64.deb