<s>
In	O
Unix-like	B-Operating_System
operating	I-Operating_System
systems	I-Operating_System
,	O
unlink	B-Device
is	O
a	O
system	B-Operating_System
call	I-Operating_System
and	O
a	O
command	B-Application
line	I-Application
utility	O
to	O
delete	O
files	O
.	O
</s>
<s>
The	O
program	O
directly	O
interfaces	O
the	O
system	B-Operating_System
call	I-Operating_System
,	O
which	O
removes	O
the	O
file	O
name	O
and	O
(	O
but	O
not	O
on	O
GNU	B-Operating_System
systems	I-Operating_System
)	O
directories	O
like	O
rm	B-Application
and	O
rmdir	B-Device
.	O
</s>
<s>
If	O
the	O
file	O
name	O
was	O
the	O
last	O
hard	B-Application
link	I-Application
to	O
the	O
file	O
,	O
the	O
file	O
itself	O
is	O
deleted	O
as	O
soon	O
as	O
no	O
program	O
has	O
it	O
open	O
.	O
</s>
<s>
It	O
also	O
appears	O
in	O
the	O
PHP	B-Application
,	O
Node.js	B-Language
,	O
R	B-Language
,	O
Perl	B-Language
and	O
Python	B-Language
standard	O
libraries	O
in	O
the	O
form	O
of	O
the	O
unlink( )	O
built-in	O
function	O
.	O
</s>
<s>
Like	O
the	O
Unix	B-Application
utility	I-Application
,	O
it	O
is	O
also	O
used	O
to	O
delete	O
files	O
.	O
</s>
<s>
In	O
PHP	B-Application
,	O
one	O
could	O
use	O
the	O
following	O
function	O
to	O
do	O
the	O
same	O
:	O
</s>
<s>
The	O
Perl	B-Language
syntax	O
is	O
identical	O
to	O
the	O
PHP	B-Application
syntax	O
,	O
save	O
for	O
the	O
parentheses	O
:	O
</s>
<s>
In	O
Node.js	B-Language
it	O
is	O
almost	O
the	O
same	O
as	O
the	O
others	O
:	O
</s>
<s>
In	O
R	B-Language
(	O
with	O
the	O
S	O
language	O
compatibility	O
)	O
:	O
</s>
<s>
Similarly	O
in	O
Python	B-Language
:	O
</s>
