Filesystems
A Debian system uses a filesystem to store and manage your data. This
chapter introduces you to the filesystem, describes how to add and remove
filesystems, and shows you how to back up your system.
Concepts
It's probably a good idea to explain a little theory before discussing the
mechanics of using disks. In particular, you must understand the concept
of a filesystem. This can be a bit confusing because it has several
meanings.
The filesystem refers to the whole directory tree, starting with the root
directory /, as described in earlier chapters.
A filesystem in general means any organization of files and directories on
a particular physical device. ``Organization'' means the hierarchical
directory structure and any other information about files one might want
to keep track of: their size, who has permission to change them, etc. So
you might have one filesystem on your hard disk, and another one on each
floppy disk.
``Filesystem'' is also used to mean a type of filesystem. For example,
MS-DOS and Windows 3.
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