Links
  Hard link - multiple file names that reference the same inode #.
 
  Symbolic link - alias in the form of a separate specially tagged file 
    containing the original name and (optionally) additional path info.

Hard links
  When more than one directory entry refers to a particular inode #,
    a hard link has been established.

  All hard links to a particular inode must be on the same partition.

  Hard links cannot be used on directory files.

  As long as at least one link exists, file will exist.

  Hard links can access a file even if directory permissions of original
    file change.   

  However, unless you are administrator, it may be difficult to locate the
    linked file names once they are established.