1. A network file distribution system optimized for CVS (client) CVSup is a software package for distributing and updating collections of files across a network. It can efficiently and accurately mirror all types of files, including sources, binaries, hard links, symbolic links, and even device nodes. CVSup's streaming communication protocol and multithreaded architecture make it most likely the fastest mirroring tool in existence today. In addition to being a great general-purpose mirroring tool, CVSup includes special features and optimizations specifically tailored to CVS repositories. From Debian 3.0r0 APT