On a Linux system, permissions are used to secure access. In this chapter, you’ll learn how to modify ownership to accommodate permissions. To begin with, the basic read, write, and execute permissions are covered. Next, you’ll learn how to apply advanced Linux permissions for some extra security. Finally, at the end of this chapter you’ll learn how to create Access Control Lists to give permissions to more than one user or group and how to work with attributes to add an extra layer of protection to files.