<s>
The	O
NetBSD	B-Device
rump	B-Application
kernel	I-Application
is	O
the	O
first	O
implementation	O
of	O
the	O
"	O
anykernel	B-Application
"	O
concept	O
where	O
drivers	B-Application
either	O
can	O
be	O
compiled	O
into	O
or	O
run	O
in	O
the	O
monolithic	B-Operating_System
kernel	I-Operating_System
or	O
in	O
user	O
space	O
on	O
top	O
of	O
a	O
light-weight	O
kernel	O
.	O
</s>
<s>
The	O
NetBSD	B-Device
drivers	B-Application
can	O
be	O
used	O
on	O
top	O
of	O
the	O
rump	B-Application
kernel	I-Application
on	O
a	O
wide	O
range	O
of	O
POSIX	O
operating	O
systems	O
,	O
such	O
as	O
the	B-Application
Hurd	I-Application
,	O
Linux	B-Application
,	O
NetBSD	B-Device
,	O
DragonFly	B-Application
BSD	I-Application
,	O
Solaris	B-Application
kernels	I-Application
and	O
even	O
Cygwin	B-Language
,	O
along	O
with	O
the	O
file	B-Application
system	I-Application
utilities	O
built	O
with	O
the	O
rump	O
libraries	O
.	O
</s>
<s>
The	O
rump	B-Application
kernels	I-Application
can	O
also	O
run	O
without	O
POSIX	O
directly	O
on	O
top	O
of	O
the	O
Xen	B-Operating_System
hypervisor	I-Operating_System
,	O
an	O
L4	B-Operating_System
microkernel	I-Operating_System
using	O
the	O
Genode	B-Language
OS	I-Language
Framework	I-Language
or	O
even	O
on	O
"	O
OS-less	O
"	O
bare	O
metal	O
.	O
</s>
<s>
An	O
anykernel	B-Application
is	O
different	O
in	O
concept	O
from	O
microkernels	B-Operating_System
,	O
exokernels	B-Operating_System
,	O
partitioned	B-Operating_System
kernels	I-Operating_System
or	O
hybrid	B-Operating_System
kernels	I-Operating_System
in	O
that	O
it	O
tries	O
to	O
preserve	O
the	O
advantages	O
of	O
a	O
monolithic	B-Operating_System
kernel	I-Operating_System
,	O
while	O
still	O
enabling	O
the	O
faster	O
driver	O
development	O
and	O
added	O
security	O
in	O
user	O
space	O
.	O
</s>
<s>
The	O
"	O
anykernel	B-Application
"	O
concept	O
refers	O
to	O
an	O
architecture-agnostic	O
approach	O
to	O
drivers	B-Application
where	O
drivers	B-Application
can	O
either	O
be	O
compiled	O
into	O
the	O
monolithic	B-Operating_System
kernel	I-Operating_System
or	O
be	O
run	O
as	O
a	O
userspace	O
process	O
,	O
microkernel-style	O
,	O
without	O
code	O
changes	O
.	O
</s>
<s>
With	O
drivers	B-Application
,	O
a	O
wider	O
concept	O
is	O
considered	O
where	O
not	O
only	O
device	B-Application
drivers	I-Application
are	O
included	O
but	O
also	O
file	B-Application
systems	I-Application
and	O
the	O
networking	B-Protocol
stack	I-Protocol
.	O
</s>
<s>
The	O
File	B-Application
System	I-Application
Access	O
Utilities	O
(	O
fs-utils	O
)	O
is	O
a	O
subproject	O
built	O
with	O
the	O
rump	O
libraries	O
.	O
</s>
<s>
It	O
aims	O
to	O
have	O
a	O
set	O
of	O
utilities	O
to	O
access	O
and	O
modify	O
a	O
file	B-Application
system	I-Application
image	O
without	O
having	O
to	O
mount	O
it	O
.	O
</s>
<s>
The	O
advantage	O
of	O
fs-utils	O
over	O
similar	O
projects	O
such	O
as	O
mtools	B-Application
is	O
supporting	O
the	O
usage	O
of	O
familiar	O
filesystem	B-Application
Unix	B-Application
commands	I-Application
(	O
ls	B-Application
,	O
cp	B-Application
,	O
mv	O
,	O
cd	B-Application
,	O
etc	O
.	O
)	O
</s>
<s>
for	O
a	O
large	O
number	O
of	O
file	B-Application
systems	I-Application
which	O
are	O
supported	O
by	O
NetBSD	B-Device
.	O
</s>
