R SIG Debian - Jun 2025 - Updating to R 4.5.1 on Ubuntu Plucky

Hi Dirk,

Thanks for your help. I really appreciate it! I followed the instructions for
installation that are on CRAN. It may be just that Michael hasn't updated
the .deb packages yet. I'll wait and see. The handling of the apt sources
list has changed a bit in the last couple of Ubuntu releases. I thought maybe
that was causing a problem. Also, I should probably RTFM. ?

Thanks again for all your efforts,

Simone.


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________________________________
From: Dirk Eddelbuettel <edd at debian.org>
Sent: Monday, June 16, 2025 1:37 PM
To: Simone Blomberg <s.blomberg1 at uq.edu.au>
Cc: r-sig-debian at r-project.org <r-sig-debian at r-project.org>
Subject: Re: [R-sig-Debian] Updating to R 4.5.1 on Ubuntu Plucky


On 15 June 2025 at 23:45, Simone Blomberg via R-SIG-Debian wrote:
| When I do apt update I get the following output:
|
| simoneb at laptop:~$ sudo apt update
| Hit:1 https://cloud.r-project.org/bin/linux/ubuntu noble-cran40/ InRelease
[...]
| Notice: Missing Signed-By in the sources.list(5) entry for
'https://cloud.r-project.org/bin/linux/ubuntu'
|
| Should I be disturbed by the Missing Signed-By? If so, is there a way to fix
it?

That is covered in the README.md at

  https://cloud.r-project.org/bin/linux/ubuntu/

where Michael and I explain how to

  a) add the apt repo for the ubuntu mirror at CRAN and
  b) how to add a key for it.

There are scripted solutions too as eg each and every CI run using this repo
does it too. One way is (based on my r-ci setup)

  wget -q -O- https://cloud.r-project.org/bin/linux/ubuntu/marutter_pubkey.asc |
\
     sudo tee -a /etc/apt/trusted.gpg.d/cran_ubuntu_key.asc

but it's late on a Sunday here so I am not double-checking this against the
README.md which I did double and triple-checked when we updated it.

You did not share with us what you did you saying more is tricky.  (Also
while I uploaded the R 4.5.1 package to Debian on Friday I do not yet see a
4.5.1 Ubuntu package so Michael may not have gotten to it. All these steps
are done by colunteers so you should factor that into your expectations of
the timeliness of the service.

Best, Dirk

--
dirk.eddelbuettel.com | @eddelbuettel | edd at debian.org

	[[alternative HTML version deleted]]

Hi Simone,

On 16 June 2025 at 03:45, Simone Blomberg wrote:
| Thanks for your help. I really appreciate it! I followed the instructions for
| installation that are on CRAN. It may be just that Michael hasn't updated
the
| .deb packages yet. I'll wait and see. The handling of the apt sources list
has
| changed a bit in the last couple of Ubuntu releases. I thought maybe that was
| causing a problem. Also, I should probably RTFM. ?

There are two distinct issues here, and you are conflating them. Treating
them separately makes it easier.

One is that indeed as of right now we have no R 4.5.1 for Ubuntu at CRAN.
Michael will get to it, he always has. (I did my part on the Debian bits he
uses, now we wait.) You can use rocker/r-base aka r-base with 4.5.1 now, as
you can for Debian unstable/testing.

Two is that apt input format changed from .list to .sources, and also changes
how security keys are reported / required -- all following some time after
22.04. I think that hit me for 24.04 but my repos (i.e. r2u) do the right
thing now, as do the machines I run. How to set that up on your end is more
of a generic Ubuntu question you could google (and sorry I do this to you but
I don't have a link handy as I said it is coming up to 23h on a Sunday
here). My scripts (for r2u, for r-ci, ... ) do the right thing, you can find
it there too. I have no issue either on this machine (still 24.10 nor on
another updated to 25.04).

I am sure you can sort this out over one fresh hot cup of coffee or tea. If
and when you do feel would you mind sending the notes to this thread?

Thanks, Dirk

-- 
dirk.eddelbuettel.com | @eddelbuettel | edd at debian.org