# apt-add-repository > Manages apt repository definitions. > More information: . - 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}}`