information node

   Abbreviated i-node, sometimes written inode, pronounced "[eye-node]." In Unix, a data structure on disk that describes a file.
   Each directory entry associates a filename with an i-node; although a single file may have several filenames, one for each link , a file has only one i-node. Within a filesystem, the number of i-nodes, and therefore the number of files, is defined when the system is first initialized. An i-node contains all the information Unix needs to be able to access the file, including the file's length, the times that the file was last accessed or modified, owner and group ID information, access permissions, the number of links to the file, and the disk address of the data blocks that contain the file itself.
   See also i-node table.

Dictionary of networking . 2014.

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