# add-apt-repository > Manages apt repository definitions. > More information: <https://manned.org/apt-add-repository>. - Add a new apt repository: `add-apt-repository {{repository_spec}}` - Remove an apt repository: `add-apt-repository --remove {{repository_spec}}` - Update the package cache after adding a repository: `add-apt-repository --update {{repository_spec}}` - Allow source packages to be downloaded from the repository: `add-apt-repository --enable-source {{repository_spec}}`