The repository 'https://ppa.launchpadcontent.net/oguzhaninan/stacer/ubuntu lunar Release' does not have a Release file. can't update when i type sudo apt update its shows like this i don't know what to do can u please help me
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The PPA does not support Ubuntu 23.04. That's why you get the error. However, the deafault Ubuntu repositories contain the package.
First, remove the PPA.
sudo add-apt-repository --remove ppa:oguzhaninan/stacer
Then, run
sudo apt update
Finally, install stacer from the Ubuntu repositories with
sudo apt install stacer

Archisman Panigrahi
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