5. Inode

• Inode size is 128 bytes.

• Inode contains the following metadata fields:

  • inode type: file, directory, or pipe (zero means that inode is free.)

  • locations of data blocks on disk

  • file size

  • ownership: user/group

  • access permission attributes: read/write/execute/directory search

  • file last access/modified timestamps

  • inode last modified timestamp (always changes when file is modified.)

• NOTE: inode contains no information about file path!