Auto Package Download For TeXLive
Answer : While in MiKTeX an installation process is automatically triggered if you have, say, \usepackage{beamer} in a document preamble without the corresponding package installed, there is no such feature on TeX Live. The last statement is not true actually, as pointed out by wasteofspace in the comments there is the texliveonfly package that implements the on demand installation in TeX Live 2010 and later. I never tested it and don't know if it has drawbacks. However, if you install the full (or almost full) TeX Live collection of packages (~2400) you will not need to add new packages, a periodic tlmgr update -all will take care of everything, including the installation of packages added to the TeX Live collection after you first full installation. This feature is explained in the tlmgr manual. Analogously, if a package has been added to a collection on the server that is also installed locally, it will be added to the local installation. This is called auto-...