How to Install R and RStudio on Ubuntu 14.04 (trusty) for the blog https://medium.com/@GalarnykMichael/install-r-and-rstudio-on-ubuntu-12-04-14-04-16-04-b6b3107f7779#.8bwdcvjxv

RStudioUbuntu1404.sh

# Install R + RStudio on Ubuntu 14.04

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 trusty/'
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

Hello. Would you help me please.

I use Ubuntu 14.04 LTS (64) Linux Mint 17.2 Rafaela
R version 3.5.3 (2019-03-11) -- "Great Truth"

I tried to install the latest version of RStudio but it fails to work.
Now I use Version 1.0.44 but it works with bugs.

What is the latest stable version of RStudio for me?

Hey oktu. You can find newer versions compiled for Ubuntu 14.04 Trusty at download1.rstudio.org/. There is a huge list of files there. You can search for "trusty/amd64/rstudio-1", then change the URL. There are 6 available versions right now, this may change.
https://download1.rstudio.org/desktop/trusty/amd64/rstudio-1.2.1335-amd64.deb 2019-04-08
https://download1.rstudio.org/desktop/trusty/amd64/rstudio-1.2.1578-amd64.deb 2019-09-17
https://download1.rstudio.org/desktop/trusty/amd64/rstudio-1.2.5001-amd64.deb 2019-09-19
https://download1.rstudio.org/desktop/trusty/amd64/rstudio-1.2.5019-amd64.deb 2019-11-01
https://download1.rstudio.org/desktop/trusty/amd64/rstudio-1.2.5033-amd64.deb 2019-12-17
https://download1.rstudio.org/desktop/trusty/amd64/rstudio-1.2.5042-amd64.deb 2020-04-13