# apt-add-repository > Manages apt repository definitions. > More information: <https://manpages.debian.org/latest/software-properties-common/apt-add-repository.1.html>. - Add a new apt repository: `apt-add-repository {{repository_spec}}` - Remove an apt repository: `apt-add-repository --remove {{repository_spec}}` - Update the package cache after adding a repository: `apt-add-repository --update {{repository_spec}}` - Enable source packages: `apt-add-repository --enable-source {{repository_spec}}`