# Ubuntu – How to properly add repository of different release

Provided Ubuntu 16.04 installed I want to add artful (17.10) repository to be able to install additional packages.

Simply doing this seems to be not enough as there also seem 'artful-updates' and 'artful-security' repos available:

/usr/bin/add-apt-repository -y -u 'artful'


Does this mean if I do not install these additional repos I may end up with non-secure package installed?

Should I install everything instead like this?:

/usr/bin/add-apt-repository -y -u 'artful'