1. install latest R in Ubuntu

update the source list by sudo vi /etc/apt/sources.list

add the following line into /etc/apt/sources.list

deb https://https://cran.cnr.Berkeley.edu/bin/linux/ubuntu trusty/

Then

sudo apt-get update
sudo apt-get install r-base
sudo apt-get install r-base-dev

1. install RStudio Server

sudo apt-get install gdebi-core
wget https://download2.rstudio.org/rstudio-server-0.99.485-amd64.deb
sudo gdebi rstudio-server-0.99.485-amd64.deb

double check install successfully: sudo rstudio-server verify-installation

1. start RStudio Server http://<myip>:8787

Reference:

1. Download RStudio Server

2. UBUNTU PACKAGES FOR R