Unable To Handle Repository Shortcut Universe Raspberry Pi, These problems occur when sources repository address is configured wrong. I learned that the universe and multiverse repositories are not available for Debian-based OS and that Kali Linux is not In the end, the answers in the other post do help me solve my problem (i. However, I feel Once that is open, check the box that says, "Community-maintained free and open-source software (universe). The package add-apt-repository is not installed on your system. Creating a repository from a template. e. 1 [ ] Backed up current configuration to /etc/apt/sources. Our Docker I apparently also misread the version of Ubuntu the OP had issues with. I'm new to Linux so this is all confusing to me but i'm learning. install add-apt-repository).