The Linux kernel supports many different types of filesystems. In the following, we introduce a few special types of filesystems that play an important role in the internal design of the Linux kernel.
Next, we shall discuss filesystem registration—that is, the basic operation that must be performed, usually during system initialization, before using a filesystem type. Once a filesystem is registered, its specific functions are available to the kernel, so that type of filesystem can be mounted on the system's directory tree.
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