How to delete GPG key and repository? Key is not shown under apt-key

Question

I wanted to install ctop on Ubuntu 22 and added the key and repository. But the repository does not contain a release file and apparently ctop is no longer maintained.

Now I wanted to delete the key and repository, but key is not displayed via sudo apt-key list.

How do I delete the key + repository properly? I see that key in "/usr/share/keyrings"

I used these commands:

sudo apt-get install ca-certificates curl gnupg lsb-release
curl -fsSL https://azlux.fr/repo.gpg.key | sudo gpg --dearmor -o /usr/share/keyrings/azlux-archive-keyring.gpg
echo \
  "deb [arch=$(dpkg --print-architecture) signed-by=/usr/share/keyrings/azlux-archive-keyring.gpg] http://packages.azlux.fr/debian \
  $(lsb_release -cs) main" | sudo tee /etc/apt/sources.list.d/azlux.list >/dev/null
sudo apt-get update

Source: https://github.com/bcicen/ctop

Does this answer your question? What can I do if a repository/PPA does not have a Release file? — guiverc, Feb 18 '24 at 23:48
I opened a link you provided & can see very quickly it provides support for Debian releases only; but you state you're using Ubuntu and haven't made allowance for that. Your release details show 22 (Ubuntu Core 22 is the snap only version of 22.04 but cannot use all packages built for 22.04!) which is unclear so please be precise. — guiverc, Feb 18 '24 at 23:50

score 1 · Accepted Answer · answered Feb 18 '24 at 23:50

Normally you would use add-apt-repository -r , but https://github.com/bcicen/ctop?tab=readme-ov-file#debianubuntu does not appear to be a PPA. Looking at the installation steps, we can just reverse them:

sudo rm -rf /var/lib/apt/lists/ /usr/share/keyrings/azlux-archive-keyring.gpg /etc/apt/sources.list.d/azlux.list
sudo apt update

How to delete GPG key and repository? Key is not shown under apt-key

1 Answers1