In Linux, an inode or index node stores everything about a file, except for the filename and the file data.
An inode is known to be often called index node. This is known to be a data structure that pertains to UNIX operating systems that has all the vital information that is regards to files that are found within a file system.
Not that if a file system is made in UNIX, a set amount of inodes is formed and Linux often uses an index node (or inode) to save all the key or relevant information about a file.
Hence according to the above,In Linux, an inode or index node stores everything about a file, except for the filename and the file data.
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