tlbuild: tlmgr DESCRIPTION

 
 B.3 DESCRIPTION
 ===============
 
 *tlmgr* manages an existing TeX Live installation, both packages and
 configuration options.  For information on initially downloading and
 installing TeX Live, see <https://tug.org/texlive/acquire.html>.
 
    The most up-to-date version of this documentation (updated nightly
 from the development sources) is available at
 <https://tug.org/texlive/tlmgr.html>, along with procedures for updating
 'tlmgr' itself and information about test versions.
 
    TeX Live is organized into a few top-level _schemes_, each of which
 is specified as a different set of _collections_ and _packages_, where a
 collection is a set of packages, and a package is what contains actual
 files.  Schemes typically contain a mix of collections and packages, but
 each package is included in exactly one collection, no more and no less.
 A TeX Live installation can be customized and managed at any level.
 
    See <https://tug.org/texlive/doc> for all the TeX Live documentation
 available.