The tasks of an administrator are many and include the responsibility for what services the system provides (especially how they are started and shut down), network configuration, system backup, filesystem space management, system operation (system logs), and providing the face the system shows to the world. We've covered some of the issues in each of these areas, although comprehensive coverage of any of the subjects could take several books. One subject not covered here that must be covered in depth is basic system security. We will cover this in the next chapter.
