Is it impossible to install R 4.0 on Ubuntu 18.04.4 LTS because r-base-core requires a libc6 version = 2.29?
I am using Ubuntu 18.04, for this there should be a single sourcedeb https://cloud.r-project.org/bin/linux/ubuntu bionic-cran40/ in /etc/apt/sources.list
Unfortunately, I added deb https://cloud.r-project.org/bin/linux/ubuntu focal-cran40/ by mistake which I removed to install R 4.0
R is successfully installed now.
Unmet dependencies installing R 3.6.2 on Ubuntu 18.14 LTS
I took a look at the etc/apt/sources.list file and realised that I had the same repository repeated. I deleted two lines and the problem was solved.
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