What's a filesystem anyway? A set of data structures that tell the system how the physical data storage on the disc is organized into files? The organizing principles that make it possible to store data in a predictable way, so it can be retrieved easily not just by one person but by many? A fruitless battle against entropy, as the established hierarchy gets overgrown, overthrown, and fragmented?
The next 11 chapters deal with this enormous subject, so central to the art of working with UNIX:
How to get around the filesystem.
How to use wildcards effectively to point to more than one file.
How to find the files you've stored in the filesystem–using ls in all its forms.
How to use find, the "power saw" of file search operations.
How to link, rename, and copy files effectively.
How to create archives for storing and moving many files.
How and why to make backups–not just a job for the system administrator.
Other miscellaneous hints about managing files.
How file ownership works.
How to remove files.
Other ways to free up disk space.
Chapter 14: Moving Around in a Hurry
Chapter 15: Wildcards
Chapter 16: Where Did I Put That?
Chapter 17: Finding Files with find
Chapter 18: Linking, Renaming, and Copying Files
Chapter 19: Creating and Reading Archives
Chapter 20: Backing Up Files
Chapter 21: More About Managing Files
Chapter 22: File Security, Ownership, and Sharing
Chapter 23: Removing Files
Chapter 24: Other Ways to Get Disk Space