tlmgr
Manages packages and configuration options of an existing TeX Live installation.
TLDR
Install a package and its dependencies
$ tlmgr install [package]
Remove a package and its dependencies
$ tlmgr remove [package]
Display information about a package
$ tlmgr info [package]
Update all packages
$ tlmgr update --all
Show possible updates without updating anything
$ tlmgr update --list
Start a GUI version of tlmgr
$ tlmgr gui
List all TeX Live configurations
$ tlmgr conf
