In this chapter, we work with the mechanisms provided by operating systems like Unix and Windows to protect files and folders. We also take a technical look at the fifth phase of the security process: monitoring the system. The chapter focuses on these topics:

• ■   Tailoring the security policy to grant special access to individuals or groups

• ■   Permission flags in Unix-like systems

• ■   Access control lists in Macintosh and Windows systems

• ■   Monitoring system events through logging