<s>
libvirt	B-Language
is	O
an	O
open-source	B-Application
API	B-Application
,	O
daemon	B-Operating_System
and	O
management	O
tool	O
for	O
managing	O
platform	B-General_Concept
virtualization	I-General_Concept
.	O
</s>
<s>
It	O
can	O
be	O
used	O
to	O
manage	O
KVM	B-Application
,	O
Xen	B-Operating_System
,	O
VMware	B-Operating_System
ESXi	I-Operating_System
,	O
QEMU	B-Application
and	O
other	O
virtualization	B-General_Concept
technologies	I-General_Concept
.	O
</s>
<s>
These	O
APIs	B-Application
are	O
widely	O
used	O
in	O
the	O
orchestration	O
layer	O
of	O
hypervisors	B-Operating_System
in	O
the	O
development	O
of	O
a	O
cloud-based	O
solution	O
.	O
</s>
<s>
libvirt	B-Language
is	O
a	O
C	B-Language
library	B-Library
with	O
bindings	O
in	O
other	O
languages	O
,	O
notably	O
in	O
Python	B-Language
,	O
Perl	B-Language
,	O
OCaml	B-Language
,	O
Ruby	B-Language
,	O
Java	B-Language
,	O
JavaScript	B-Language
(	O
via	O
Node.js	B-Language
)	O
and	O
PHP	B-Application
.	O
</s>
<s>
libvirt	B-Language
for	O
these	O
programming	O
languages	O
is	O
composed	O
of	O
wrappers	O
around	O
another	O
class/package	O
called	O
libvirtmod	O
.	O
</s>
<s>
libvirtmod	O
's	O
implementation	O
is	O
closely	O
associated	O
with	O
its	O
counterpart	O
in	O
C/C	O
++	O
in	O
syntax	O
and	O
functionality	O
.	O
</s>
<s>
Various	O
virtualization	O
programs	O
and	O
platforms	O
use	O
libvirt	B-Language
.	O
</s>
<s>
Virtual	B-Language
Machine	I-Language
Manager	I-Language
,	O
GNOME	B-Language
Boxes	I-Language
and	O
others	O
provide	O
graphical	O
interfaces	O
.	O
</s>
<s>
The	O
most	O
popular	O
command	O
line	O
interface	O
is	O
virsh	B-Language
,	O
and	O
higher	O
level	O
tools	O
such	O
as	O
oVirt	B-Language
.	O
</s>
<s>
Development	O
of	O
libvirt	B-Language
is	O
backed	O
by	O
Red	O
Hat	O
,	O
with	O
significant	O
contributions	O
by	O
other	O
organisations	O
and	O
individuals	O
.	O
</s>
<s>
libvirt	B-Language
is	O
available	O
on	O
most	O
Linux	B-Application
distributions	O
;	O
remote	O
servers	O
are	O
also	O
accessible	O
from	O
Apple	O
and	O
Microsoft	B-Application
Windows	I-Application
clients	O
.	O
</s>
