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12.1 link: Make a hard link via the link syscall

link creates a single hard link at a time. It is a minimalist interface to the system-provided link function. See (libc)Hard Links section `Hard Links' in The GNU C Library Reference Manual. It avoids the bells and whistles of the more commonly-used ln command (see section ln: Make links between files). Synopsis:

link filename linkname

filename must specify an existing file, and linkname must specify a nonexistent entry in an existing directory. link simply calls link (filename, linkname) to create the link.

On a GNU system, this command acts like ‘ln --directory --no-target-directory filename linkname’. However, the ‘--directory’ and ‘--no-target-directory’ options are not specified by POSIX, and the link command is more portable in practice.

An exit status of zero indicates success, and a nonzero value indicates failure.

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