Linux File System Inodes: A Basic Look
After discussing super block structure and its operations, we will discuss inodes today. Inodes is to file system what food is to any living creature.
Inode stores basic information about a regular file, directory, or other file system object. The inode number is a unique integer assigned to the device upon which it is stored. All files are hard links to inodes. Whenever a program refers to a file by name, the system conceptually uses the filename to search for the corresponding inode. Many computer programs often give i-node numbers to designate a file. Popular disk integrity checking utilities fsck or pfiles command may serve here as examples.
The stat system call retrieves a file's inode number and some of the information in the inode.
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