<s>
Debian-Installer	B-Language
is	O
a	O
system	O
installer	O
designed	O
for	O
the	O
Debian	O
Linux	B-Application
distribution	I-Application
.	O
</s>
<s>
It	O
originally	O
appeared	O
in	O
the	O
Debian	O
release	O
3.1	O
(	O
Sarge	O
)	O
,	O
released	O
on	O
June	O
6	O
,	O
2005	O
,	O
although	O
the	O
first	O
release	O
of	O
a	O
Linux	B-Application
distribution	I-Application
that	O
used	O
it	O
was	O
Skolelinux	B-Application
(	O
Debian-Edu	O
)	O
1.0	O
,	O
released	O
in	O
June	O
2004	O
.	O
</s>
<s>
It	O
is	O
also	O
one	O
of	O
two	O
official	O
installers	O
available	O
for	O
Ubuntu	B-Operating_System
,	O
the	O
other	O
being	O
called	O
Ubiquity	B-Language
(	O
itself	O
based	O
on	O
parts	O
of	O
debian-installer	B-Language
)	O
which	O
was	O
introduced	O
in	O
Ubuntu	B-Operating_System
6.06	O
(	O
Dapper	O
Drake	O
)	O
.	O
</s>
<s>
It	O
makes	O
use	O
of	O
cdebconf	O
(	O
a	O
re-implementation	O
of	O
debconf	O
in	O
C	B-Language
)	O
to	O
perform	O
configuration	O
at	O
install	O
time	O
.	O
</s>
<s>
Originally	O
,	O
it	O
was	O
only	O
supported	O
under	O
text-mode	O
and	O
ncurses	B-Language
.	O
</s>
<s>
A	O
graphical	O
front-end	O
(	O
using	O
GTK-DirectFB	O
)	O
was	O
first	O
introduced	O
in	O
Debian	O
4.0	O
(	O
Etch	O
)	O
.	O
</s>
<s>
Since	O
Debian	O
6.0	O
(	O
Squeeze	O
)	O
,	O
it	O
is	O
used	O
over	O
Xorg	B-Protocol
instead	O
of	O
DirectFB	B-Application
.	O
</s>
<s>
debootstrap	O
is	O
software	O
which	O
allows	O
installation	O
of	O
a	O
Debian	O
base	O
system	O
into	O
a	O
subdirectory	O
of	O
another	O
,	O
already	O
installed	O
operating	B-General_Concept
system	I-General_Concept
.	O
</s>
<s>
It	O
can	O
also	O
be	O
installed	O
and	O
run	O
from	O
another	O
operating	B-General_Concept
system	I-General_Concept
or	O
to	O
create	O
a	O
"	O
cross-debootstrapping	O
"	O
,	O
a	O
rootfs	B-Application
for	O
a	O
machine	O
of	O
a	O
different	O
architecture	O
,	O
for	O
instance	O
,	O
OpenRISC	O
.	O
</s>
<s>
There	O
is	O
also	O
a	O
largely	O
equivalent	O
version	O
written	O
in	O
C	B-Language
–	O
cdebootstrap	O
,	O
which	O
is	O
used	O
in	O
debian-installer	B-Language
.	O
</s>
<s>
debootstrap	O
can	O
be	O
used	O
to	O
install	O
Debian	O
in	O
a	O
system	O
without	O
using	O
an	O
installation	O
disk	O
but	O
can	O
also	O
be	O
used	O
to	O
run	O
a	O
different	O
Debian	O
flavor	O
in	O
a	O
chroot	B-Application
environment	I-Application
.	O
</s>
