# apt-add-repository > Manage `apt` repository definitions. > More information: . - Add a new `apt` repository: `apt-add-repository {{repository_spec}}` - Remove an `apt` repository: `apt-add-repository {{[-r|--remove]}} {{repository_spec}}` - Update the package cache after adding a repository: `apt-add-repository --update {{repository_spec}}` - Enable source packages: `apt-add-repository {{[-s|--enable-source]}} {{repository_spec}}`