b62d1e58_g_Tools__The_Library_Installer__Example_Description
[Option] /gc [Example/Description] 
libinst.console update /gc Use this update option to "get collections" or retrieve all new content collections that have been added or rebuilt (as opposed to simply updated) to an existing library. This update option is similar to its install option counterpart, in that it retrieves (1) any update files and (2) Library.libinst along withthe new content collections.
Documentation :Building and Deploying Content :Publishing Tools :The Library Installer
Example/Description