Ubuntu

update manager cran

Asked by Ivailo Partchev

My Update Manager (maverick) has taken the habit to refuse updating anything from the r-cran mirror under the pretext that "The action would require the installation of packages from not authenticated sources". It also reuses to update anything unless I remove c-ran packages from the list. Given that R is the main reason for me to own a computer in the first place, I would like to make it drop this habit -- but how?

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Ivailo Partchev
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PeterPall (peterpall) said : 		#1

This seems to be a problem with the mirror or with the network connection as it appears only if the update manager can download at least some of the files containing lists of currently available packages but it
- either cannot verify that these lists haven't been tampered with since the file it needs in order to to check the authentity of these lists cannot be downloaded.
- or it cannot verify the authentity of the list files it is using since it already knows how the current lists should look like - but failed to download some of them and therefore has to resort to use a mixture of old and new package list files instead.

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GREG T. (ubuntuer) said : 		#2

is this set up in software sources ?

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Ivailo Partchev (partchev) said : 		#3

Thank you very much for your help, Peter. I have it solved now, and if anyone else is interested: It is not sufficient to add the cran repository, one also has to download a key and feed it to apt-key. The details are given quite a bit further down on CRAN's web page.

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Ivailo Partchev (partchev) said : 		#4

Thanks to Greg too, I didn't see his message