Overview
All network operating systems have some means of controlling access to resources. The file system is a key resource on any workstation or server. Protecting that file system from unauthorized access and allowing access as needed are key components in a comprehensive security policy. This chapter provides some guidelines for an overall security policy, which includes file system security. UNIX file system security concepts are introduced and examples are provided showing how to apply them. You will learn how to determine file and directory permissions and discover what types and categories of permission exist. We will analyze the meaning of the various permission types in terms of user and group access. You will work with directory and file permissions using the command line and CDE to determine and change file and directory permissions.