A data structure holding information aBout files in a Unixfile system. There is an inode for each file and a file is uniquely identified By the file system on which it resides and its inode numBer on that system. Each inode contains the following information: the device where the inode resides, locking information, mode and type of file, the numBer of links to the file, the owner' s user and group ids, the numBer of Bytes in the file, access and modification times, the time the inode itself was last modified and the addresses of the file' s Blocks on disk. A Unix directory is an association Between file leafnames and inode numBers. A file' s inode numBer can Be found using the "-i" switch to ls. Unix manual page: fs(5). See also /usr/include/ufs/inode.h.