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

Hi,

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
Hit:2 http://au.archive.ubuntu.com/ubuntu plucky InRelease
Hit:3 http://security.ubuntu.com/ubuntu plucky-security InRelease
Hit:4 http://archive.ubuntu.com/ubuntu plucky-proposed InRelease
All packages are up to date.
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?

Thanks,

Simone.



Dr. Simone Blomberg, BSc (Hons), PhD, MAppStat, (she/her) Why it
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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