The Linux filesystem is responsible for storing your system data and managing them. A filesystem can be defined as the mechanism behind data storing and retrieval. Filesystems are usually comprised of several layers, including a logical layer that provides user interaction, APIs for different file operations, and such.

You might’ve noticed that your entire Linux installation resolves around the / point. It is called the root of the file system and is essentially the starting point of your system. It contains several directories, most bearing some historical significance. We’ll discuss the filesystem hierarchy of Linux and other Unix’s later in this guide.

Increase the size of an ext2, ext3 or ext4 filesystem

Reduce the size of an ext2, ext3 or ext4 filesystem

Reduce the space reserved for root on an ext2, ext3 or ext4 filesystem