<P> The ln command is a standard Unix command utility used to create a hard link or a symbolic link (symlink) to an existing file . The use of a hard link allows multiple filenames to be associated with the same file since a hard link points to the inode of a given file, the data of which is stored on disk . On the other hand, symbolic links are special files that refer to other files by name . </P> <P> The ln command by default creates hard links, and when called with the command line parameter ln' - s' creates symbolic links . Most operating systems prevent hard links to directories from being created since such a capability could disrupt the structure of a file system and interfere with the operation of other utilities . The ln command can however be used to create symbolic links to non-existent files . </P>

Which command is used to link the files in unix