Disable general repositories for apt-get upgrade

[nick4mony]

Hi.
I am on a dialup connection, and I would like to limit the download to the bare security-related essentials when I
# apt-get update
# apt-get upgrade

However, if I then say
# apt-get install xfce-...
(or whatever software I want), I would like to actually get that software no matter which repository it is located.

==============
Questions:
1. How do I organise the sources.list file (and/or other config files)
2. How would this change to use mirrors in Australia (although don't use a mirror for security).
==============

BTW: I do like Ubuntu, although there's quite a few things I need that aren't in the box (xfce, named[dns], lilo-doc, apache2-doc, ...)

An example sources.list file, with an idea of what I like to achieve, in a comment tagged '###'
-----start of sources.list-------------
deb cdrom:[Ubuntu 5.10 _Breezy Badger_ - Release Candidate i386 (20051005)]/ breezy main restricted

deb http://security.ubuntu.com/ubuntu breezy-security main restricted
deb-src http://security.ubuntu.com/ubuntu breezy-security main restricted

deb http://security.ubuntu.com/ubuntu breezy-security universe
deb-src http://security.ubuntu.com/ubuntu breezy-security universe

### DO NOT USE REPOSITORIES BELOW FOR apt-get upgrade
deb http://us.archive.ubuntu.com/ubuntu breezy main restricted
deb-src http://us.archive.ubuntu.com/ubuntu breezy main restricted

deb http://us.archive.ubuntu.com/ubuntu breezy-updates main restricted
deb-src http://us.archive.ubuntu.com/ubuntu breezy-updates main restricted

deb http://us.archive.ubuntu.com/ubuntu breezy universe
deb-src http://us.archive.ubuntu.com/ubuntu breezy universe

deb http://us.archive.ubuntu.com/ubuntu breezy-backports main restricted
deb-src http://us.archive.ubuntu.com/ubuntu breezy-backports main restricted

deb http://us.archive.ubuntu.com/ubuntu/ breezy multiverse
-----end of sources.list-----

[manicka]

I believe what your asking for in the first part isn't possible.

There is a list of ubuntu mirrors here
https://wiki.ubuntu.com/Archive

[lerrup]

well you could use synaptic and just untick the boxes you don't want to use for updates and then reinstate when you want to install.

ALternativeely use the # key in a text editor or switch 2 lists manually. that would do what you want.

[UbuWu]

There are very few updates besides security updates, so I don't really understand what the problem is.

[nick4mony]

There are very few updates besides security updates, so I don't really understand what the problem is.

It will be a different story when I switch to Breezy in a few days time (no?)

[nick4mony]

Thanks very much for the answers. To get what I'm after, I'll use the option for the alternative sources.list file when I'm 'installing' something.