Hardlink sub-directories and files

Dan Stromberg drsalists at gmail.com
Wed Aug 3 18:31:08 CEST 2011

On Wed, Aug 3, 2011 at 12:04 AM, Nobody <nobody at nowhere.com> wrote:

> On Tue, 02 Aug 2011 02:32:54 -0700, loial wrote:
> > However I do not think it is possible to hard link directories ?
> Modern Unices disallow hard links to directories, as it makes the
> directory "tree" not a tree, so anything which performs a recursive walk
> must explicitly check for cycles to avoid infnite recursion.
> Older systems which allowed hard links to directories required root
> privilege to do so.
Actually, I recently heard about a system with multiple Solaris Containers
set up, that were sharing their /usr via directory hardlinks.  The question
came up: How does one back up such a system?  But ufsdump worked.
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