I executed the command:
sudo add-apt-repository ppa:kubuntu-ppa/backports
but the terminal shows
N: Ignoring file '20auto-upgrades.ucf-dist' in directory '/etc/apt/apt.conf.d/' as it has an invalid filename extension
I executed the command:
sudo add-apt-repository ppa:kubuntu-ppa/backports
but the terminal shows
N: Ignoring file '20auto-upgrades.ucf-dist' in directory '/etc/apt/apt.conf.d/' as it has an invalid filename extension