To remove or delete a Personal Package Archive (PPA) on Ubuntu Linux, you can use the following apt-get
command:
sudo add-apt-repository --remove ppa:<PPA_name>
Replace <PPA_name>
with the actual name of the PPA you want to remove. For example, to remove the ppa:webupd8team/java
PPA, you would run the following command:
sudo add-apt-repository --remove ppa:webupd8team/java
After removing the PPA, you should run the following command to update the package list:
sudo apt-get update
This will ensure that the package list does not include packages from the removed PPA.