<s>
The	O
link	O
utility	O
is	O
a	O
Unix	B-Application
command	I-Application
line	O
program	O
that	O
creates	O
a	O
hard	B-Application
link	I-Application
from	O
an	O
existing	O
directory	O
entry	O
to	O
a	O
new	O
directory	O
entry	O
.	O
</s>
<s>
The	O
ln	B-Device
command	B-Application
is	O
more	O
commonly	O
used	O
as	O
it	O
provides	O
more	O
features	O
:	O
it	O
can	O
create	O
both	O
hard	B-Application
links	I-Application
and	O
symbolic	B-Application
links	I-Application
,	O
and	O
has	O
error	O
checking	O
.	O
</s>
<s>
The	O
link	O
command	B-Application
is	O
part	O
of	O
the	O
Single	O
UNIX	B-Application
Specification	O
(	O
SUS	O
)	O
,	O
specified	O
in	O
the	O
Shell	O
and	O
Utilities	O
volume	O
of	O
the	O
IEEE	O
1003.1-2001	O
standard	O
.	O
</s>
