<s>
Fontconfig	B-Device
(	O
or	O
fontconfig	B-Device
)	O
is	O
a	O
free	B-Application
software	I-Application
program	B-Library
library	I-Library
designed	O
to	O
provide	O
configuration	O
,	O
enumeration	O
and	O
substitution	O
of	O
fonts	O
to	O
other	O
programs	O
.	O
</s>
<s>
Fontconfig	B-Device
was	O
originally	O
written	O
and	O
maintained	O
by	O
Keith	O
Packard	O
,	O
and	O
is	O
currently	O
maintained	O
by	O
Behdad	O
Esfahbod	O
.	O
</s>
<s>
Fontconfig	B-Device
is	O
typically	O
used	O
on	O
graphical	O
Linux	B-Application
(	O
and	O
other	O
Unix-like	B-Operating_System
)	O
desktops	O
,	O
such	O
as	O
Xorg	B-Operating_System
and	O
Wayland	B-Language
,	O
where	O
it	O
remains	O
an	O
important	O
part	O
of	O
handling	O
fonts	O
.	O
</s>
<s>
However	O
,	O
it	O
is	O
also	O
sometimes	O
used	O
on	O
other	O
platforms	O
,	O
notably	O
including	O
Windows	B-Application
versions	O
of	O
software	O
that	O
use	O
Pango	B-Language
for	O
laying	O
out	O
and	O
rendering	O
text	O
,	O
such	O
as	O
GIMP	B-Application
.	O
</s>
<s>
End-users	O
can	O
use	O
fontconfig	B-Device
,	O
directly	O
or	O
indirectly	O
,	O
to	O
customize	O
and	O
configure	O
fonts	O
on	O
the	O
system	O
.	O
</s>
<s>
Applications	O
can	O
use	O
fontconfig	B-Device
in	O
two	O
ways	O
:	O
</s>
<s>
To	O
perform	O
font	O
matching	O
,	O
fontconfig	B-Device
stores	O
typesetting	O
information	O
about	O
all	O
of	O
the	O
installed	O
fonts	O
,	O
including	O
the	O
name	O
of	O
the	O
font	B-General_Concept
family	I-General_Concept
,	O
style	O
,	O
weight	O
,	O
dots	O
per	O
inch	O
(	O
DPI	O
)	O
,	O
and	O
Unicode	O
coverage	O
.	O
</s>
<s>
Fontconfig	B-Device
uses	O
XML	B-Protocol
format	O
for	O
its	O
configuration	O
files	O
.	O
</s>
<s>
The	O
document	B-Language
type	I-Language
definition	I-Language
(	O
DTD	O
)	O
for	O
fontconfig	B-Device
files	O
is	O
normally	O
located	O
at	O
/etc/fonts/fonts.dtd	O
.	O
</s>
<s>
Fontconfig	B-Device
ships	O
with	O
eight	O
command	O
line	O
utilities	O
to	O
manage	O
and	O
query	O
fonts	O
and	O
the	O
font	O
configuration	O
of	O
the	O
system	O
:	O
</s>
<s>
fc-list	O
:	O
Lists	O
all	O
fonts	O
fontconfig	B-Device
knows	O
about	O
or	O
all	O
fonts	O
matching	O
a	O
pattern	O
.	O
</s>
<s>
fc-match	O
:	O
Matches	O
font-pattern	O
(	O
empty	O
pattern	O
by	O
default	O
)	O
using	O
the	O
normal	O
fontconfig	B-Device
matching	O
rules	O
to	O
find	O
the	O
most	O
appropriate	O
font	O
available	O
.	O
</s>
<s>
fc-cache	O
:	O
Creates	O
a	O
cache	B-General_Concept
of	O
all	O
FreeType	B-Application
readable	O
fonts	O
in	O
a	O
specified	O
directory	O
or	O
create	O
a	O
cache	B-General_Concept
of	O
all	O
FreeType	B-Application
readable	O
fonts	O
from	O
all	O
directories	O
specified	O
in	O
the	O
configuration	O
files	O
.	O
</s>
<s>
fc-cat	O
:	O
Reads	O
the	O
font	O
information	O
from	O
cache	B-General_Concept
files	O
or	O
related	O
to	O
font	O
directories	O
and	O
emits	O
it	O
in	O
ASCII	B-Protocol
form	O
.	O
</s>
