<s>
gLinux	B-Application
is	O
a	O
Debian	O
Testing-based	O
Linux	B-Application
distribution	I-Application
used	O
at	O
Google	B-Application
as	O
a	O
workstation	B-Device
operating	B-General_Concept
system	I-General_Concept
.	O
</s>
<s>
The	B-Application
Google	I-Application
gLinux	B-Application
team	O
builds	O
the	O
system	O
from	O
source	O
code	O
,	O
introducing	O
their	O
own	O
changes	O
.	O
</s>
<s>
gLinux	B-Application
replaced	O
the	O
previously	O
used	O
Ubuntu-based	O
distribution	B-Application
,	O
Goobuntu	B-Application
.	O
</s>
<s>
gLinux	B-Application
is	O
usually	O
installed	O
by	O
loading	O
into	O
a	O
bootstrap	O
environment	O
when	O
it	O
is	O
first	O
booted	O
up	O
.	O
</s>
<s>
When	O
gLinux	B-Application
is	O
getting	O
started	O
up	O
,	O
the	O
root	O
files	O
are	O
unpacked	O
and	O
the	O
Debian	O
installer	O
starts	O
to	O
perform	O
the	O
installation	O
.	O
</s>
<s>
Over	O
the	O
years	O
,	O
Google	B-Application
has	O
focused	O
on	O
speed	O
,	O
scale	O
,	O
and	O
data	O
which	O
is	O
the	O
thought	O
process	O
that	O
allowed	O
them	O
to	O
move	O
to	O
gLinux	B-Application
.	O
</s>
<s>
Google	B-Application
was	O
using	O
Ubuntu	B-Operating_System
before	O
switching	O
to	O
gLinux	B-Application
;	O
however	O
,	O
the	O
two	O
years	O
of	O
security	O
updates	O
it	O
provided	O
meant	O
that	O
planning	O
for	O
the	O
next	O
upgrade	O
would	O
take	O
next	O
to	O
a	O
year	O
.	O
</s>
