Problem with R impish repo in Ubuntu 22.04

Following the install instructions:

wget -qO- https://cloud.r-project.org/bin/linux/ubuntu/marutter_pubkey.asc | sudo tee -a /etc/apt/trusted.gpg.d/cran_ubuntu_key.asc
sudo add-apt-repository "deb https://cloud.r-project.org/bin/linux/ubuntu impish-cran40/"
sudo update

Then get errors:

E: The repository 'https://cloud.r-project.org/bin/linux/ubuntu impish-cran40/ InRelease' provides only weak security information.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.

Never had such a problem on Ubuntu 21.10

CodePudding user response：

I've tried to figure out what exactly caused the error message, without success. However, a proper fix is available now that the CRAN maintainers have added a jammy (22.04) repository.

This should upgrade you to the jammy repository:

sudo sed -i -e s/impish/jammy/ /etc/apt/sources.list.d/r-cran.list

Alternatively, using add-apt-repository:

sudo add-apt-repository --remove "deb https://cloud.r-project.org/bin/linux/ubuntu impish-cran40/"
sudo add-apt-repository "deb https://cloud.r-project.org/bin/linux/ubuntu jammy-cran40/"