R Installation

Obtain administrative rights by requesting root access:

$ sudo -i

To install R version 4.0 or later on Ubuntu, add the CRAN (Comprehensive R Archive Network) repository to Ubuntu and install the R packages:

$ apt-key adv --keyserver keyserver.ubuntu.com --recv-keys E298A3A825C0D65DFD57CBB651716619E084DAB9
$ add-apt-repository 'deb https://cloud.r-project.org/bin/linux/ubuntu focal-cran40/'
$ apt update
$ apt install r-base r-base-dev

Start R:

$ R