Chapter 12. Backups

Table of Contents
12.1. On the importance of being backed up
12.2. Selecting the backup medium
12.3. Selecting the backup tool
12.4. Simple backups
12.4.1. Making backups with tar
12.4.2. Restoring files with tar
12.5. Multilevel backups
12.6. What to back up
12.7. Compressed backups

Hardware is indeterministically reliable. 
Software is deterministically unreliable.
People are indeterministically unreliable.
Nature is deterministically reliable.

This chapter explains about why, how, and when to make backups, and how to restore things from backups.