Problems installing rgdal on ubuntu 18.04 from, ubuntu-unstable GDAL: 3.0.2 / PROJ version: 6.2.1

Hi, are you working on a fresh R system? This because some duplicated 
files might occur when adding new repositories such as the 
ubuntugis/unstable.
I suggest you to remove all the old installations linked with rgdal such 
as gdal, qgis, GRASS, proj4, PROJ etc then I suggest to repeat the 
installation. I also suggest you to use Ubuntu Cleaner to remove all the 
files left by the uninstalling procedure into the system (configurations 
etc.)

###---Ubuntu Cleaner
sudo apt install software-properties-common
sudo add-apt-repository ppa:gerardpuig/ppa
sudo apt update
sudo apt install ubuntu-cleaner

*Maurizio Marchi,
PhD Forest Science - Ecological Mathematics*
Researcher
CNR - Institute of Biosciences and BioResources (IBBR), Florence 
division (Italy)
SkypeID: maurizioxyz
http://ibbr.cnr.it/ibbr/info/people/maurizio-marchi
#####------#####
EUFGIS National Focal Point for Italy (www.eufgis.org)
Scopus Author ID: 57188626512
ResearcherID: T-3813-2019
http://b4est.eu/ project
/...CPUs don't need to sleep.../

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