Installing R from CRAN Ubuntu repository: No Public Key Error

Question

I am on R version 2.13 and would like to update to a newer version in order to use some packages that depend on R>= 2.14.

I have the line to my sources.list file as

Answer 1

I encountered the same issue and the only solution I found, perhaps due to a firewall, was to use the helpful Y PPA Manager. The two steps below outline has worked on Ubuntu 15.04.

1) First install the Y PPA Manager:

sudo add-apt-repository ppa:webupd8team/y-ppa-manager
sudo apt-get update
sudo apt-get install y-ppa-manager

2) Then fetch missing keys by running the Y PPA Manager:

y-ppa-manager

Click "Advanced"

Next, click "Try to import missing GPG keys"

Finally, update again to check if it works:

sudo apt-get update