OpenBSD1 is a Unix-like operating system with a focus on code-correctness and a proactive approach to security. Like many server operating systems a successful install will provide a minimal command-line interface. Basic Unix system administration skills are needed. Nonetheless the userland tools are generally simple to use and very well documented. There are excellent resources available for learning OpenBSD such as Michael W Lucas’s marvellous Absolute OpenBSD2 or the less newbie-friendly project FAQ3.