Debian 10 R 3 升級 R 4

apt-key adv --keyserver keys.gnupg.net --recv-key 'E19F5F87128899B192B1A2C2AD5F960A256A04AF'

echo "deb https://cloud.r-project.org/bin/linux/debian buster-cran40/" >/etc/apt/sources.list.d/r.list

apt update
apt upgrade