There is a lot to this particular tenet, and it requires understanding the nature of Linux filesystems and mount points. If you skipped Chapter 6, “Use the Linux FHS,” you should go back and read it now.
Note
The primary meaning for the term “filesystem” in this chapter is a segment of the directory tree that is located on a separate partition or logical volume that must be mounted on a specified mount point of the root filesystem to enable access to it. We also use the term to describe the structure of the metadata on the partition or volume such as, EXT4, XFS ...
