<s>
up2date	B-Application
,	O
also	O
known	O
as	O
the	O
Red	O
Hat	O
Update	O
Agent	O
,	O
is	O
a	O
tool	O
used	O
by	O
older	O
versions	O
of	O
Red	O
Hat	O
Enterprise	O
Linux	B-Application
,	O
CentOS	O
and	O
Fedora	O
Core	O
that	O
downloads	O
and	O
installs	O
new	O
software	O
and	O
upgrades	O
the	O
operating	O
system	O
.	O
</s>
<s>
It	O
functions	O
as	O
a	O
front-end	O
to	O
the	O
RPM	B-Application
Package	I-Application
Manager	I-Application
and	O
adds	O
advanced	O
features	O
such	O
as	O
automatic	O
dependency	O
resolution	O
.	O
</s>
<s>
The	O
file	O
specifies	O
where	O
up2date	B-Application
will	O
search	O
for	O
packages	O
.	O
</s>
<s>
By	O
default	O
,	O
Red	O
Hat	O
Enterprise	O
Linux	B-Application
's	O
up2date	B-Application
retrieves	O
packages	O
from	O
a	O
Red	B-Operating_System
Hat	I-Operating_System
Network	I-Operating_System
(	O
RHN	O
)	O
server	O
,	O
though	O
users	O
can	O
add	O
directories	O
full	O
of	O
packages	O
or	O
even	O
Debian	O
and	O
yum	B-Application
repositories	O
if	O
they	O
wish	O
.	O
</s>
<s>
up2date	B-Application
on	O
Fedora	O
Core	O
defaults	O
to	O
retrieving	O
packages	O
from	O
yum	B-Application
repositories	O
.	O
</s>
<s>
Again	O
,	O
other	O
sources	O
can	O
be	O
added	O
(	O
apart	O
from	O
RHN	O
,	O
which	O
is	O
Red	O
Hat	O
Enterprise	O
Linux	B-Application
Specific	O
)	O
.	O
</s>
<s>
As	O
of	O
Fedora	O
Core	O
5	O
and	O
Red	O
Hat	O
Enterprise	O
Linux	B-Application
5	O
,	O
up2date	B-Application
is	O
no	O
longer	O
shipped	O
with	O
the	O
distribution	O
;	O
yum	B-Application
is	O
used	O
instead	O
.	O
</s>
<s>
CentOS	O
's	O
up2date	B-Application
downloads	O
packages	O
from	O
yum	B-Application
repositories	O
on	O
the	O
.	O
</s>
