What is an Inode?

An image generated by Midjourney depicting people with hats looking at a skyline, connected with wires, with blobs in them that could be inodes

An inode, short for “index node,” is a data structure used by Linux filesystems to store metadata about a file or directory. Each file and directory in a Linux or UNIX filesystem is associated with a unique inode number. The inode contains essential information about the file or directory, such as: It’s important to note that the inode itself does not contain the file’s name or the actual data. Instead, it serves as a reference point for accessing the file’s metadata and locating its data on the disk. Inode Structure and Limits Each filesystem has a fixed number of inodes, which is determined when the filesystem is created. The number …

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