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.