The command "unxz" is a utility used in Unix-like operating systems to decompress files that have been compressed using the XZ compression algorithm. It is part of the XZ Utils package, which provides tools for handling XZ-compressed files. The primary function of "unxz" is to restore the original file from its compressed state, making it accessible for use. When you run "unxz" followed by the name of a compressed file, it removes the ".xz" extension and extracts the contents. This command is commonly used in software development and data management to efficiently handle large files while saving storage space.