Patchman is a patch status monitoring tool for Linux systems. Patchman clients send a list of installed packages and enabled repositories to the server. The server (CLI or Web) tells the user which hosts require updates, whether those updates are normal or security updates, and shows installed packages that are not part of any repository. Hosts, packages, repositories. and operating systems can be filtered using features or arbitrary tags. For example, you can find out which hosts have a certain version of a package installed, and which repository it comes from. Patchman does not (yet) have the ability to update packages on hosts.