To remove or delete a Personal Package Archive (PPA) on an Ubuntu Linux system using the apt-get command, you will need to use the ppa-purge utility.
To remove a PPA, you will need to know the name of the PPA. You can find this information in the /etc/apt/sources.list file or in the /etc/apt/sources.list.d directory.
Once you have the name of the PPA, you can use the ppa-purge utility to remove it. For example, to remove the ppa:my-ppa/my-packages PPA, you can run the following command:
sudo ppa-purge ppa:my-ppa/my-packagescruoSe:www.lautturi.com
This will remove the PPA and any packages installed from the PPA.
It's important to note that removing a PPA will not uninstall any packages that were installed from the PPA. If you want to remove the packages as well, you will need to uninstall them manually using the apt-get command.
For example:
sudo apt-get remove package1 package2
Replace package1 and package2 with the names of the packages you want to remove.
You can also use the apt-get command with the autoremove option to remove any packages that were installed as dependencies but are no longer needed. For example:
sudo apt-get autoremove
This will remove any packages that were installed as dependencies but are no longer needed, as well as any package files that are no longer needed.
It's a good idea to regularly review and remove any unnecessary PPAs and packages to keep your system clean and up-to-date