<s>
devfsd	B-Application
is	O
a	O
device	O
manager	O
for	O
the	O
Linux	B-Operating_System
kernel	I-Operating_System
.	O
</s>
<s>
Primarily	O
,	O
it	O
creates	O
device	B-Application
nodes	I-Application
in	O
the	O
directory	O
when	O
kernel	B-Operating_System
drivers	O
make	O
the	O
underlying	O
hardware	O
accessible	O
.	O
</s>
<s>
The	O
nodes	O
exist	O
in	O
a	O
virtual	O
device	B-Application
file	I-Application
system	O
named	O
devfs	O
.	O
</s>
<s>
In	O
systems	O
that	O
support	O
many	O
different	O
types	O
of	O
hardware	O
,	O
each	O
of	O
which	O
has	O
its	O
own	O
device	B-Application
nodes	I-Application
,	O
this	O
is	O
more	O
convenient	O
than	O
creating	O
all	O
possible	O
device	B-Application
nodes	I-Application
beforehand	O
and	O
in	O
a	O
real	O
filesystem	B-Application
.	O
</s>
<s>
Since	O
version	O
2.5	O
of	O
the	O
Linux	B-Operating_System
kernel	I-Operating_System
,	O
devfs	O
has	O
been	O
succeeded	O
by	O
udev	B-Application
and	O
devtmpfs	B-Application
.	O
</s>
