Install_R_ubuntu18

# Note: this needs to be run in terminal

tar xf R-3.5.3.tar.gz # Unpack the R version you need to put in Ubuntu
cd R-3.5.3 # Set the directory
./configure # Assign it to the folder in computer
apt-get install gfortran libreadline-dev bzip2-dev liblzma-dev libcurl4-gnutls-dev
which R # it is usefull to know in which folder R uis running.
sudo make install # Sometimes there is a problem with R studio. 
make check # Check if it is working properly. 
# it is possible that when you open Rstudio you'll have the following message. 

# R shared library (/usr/lib64/R/lib/libR.so) not found. If this
# is a custom build of R, was it built with the --enable-R-shlib option? 
# In that case you need to do the following in terminal

make clean
./configure --enable-R-shlib=yes
make
sudo updatedb
locate libR.so # Just to check if it is right

# With this you are good to go!

# Note
# You can also try to do a soft link like this 
# ln -s /home/asn/R/lib/R/lib/libR.so /usr/local/lib/R/lib/libR.so
# But this didnt work for me