ProShield is a system administration/security program for Ubuntu/Debian GNU/Linux. It helps insure that your system is secure and up-to-date by checking many different aspects of your system. Whether you are a Linux novice or a system administrator with a dozen servers, ProShield is designed to be usable by all. Its main goal is to help secure a newly installed computer, as well as maintain the security of an existing machine. It's part security and part security administration.