On Wed, Jun 09, 2010 at 07:31:20PM -0700, ABSDoug wrote:
> If you boot up a fresh install of Debian & after you boot up, plug in your 
> Ethernet cable & try to add software, 
> Debian asks for the install disk. If you plug in Ethernet BEFORE you boot up 
> it will look online for software. 
> 

Think :) - This is by design, particularly if you consider the use of network 
install media.

1. Rare case now - you have no network at all. All installation must be done 
from CDs / DVDs. The apt sources
list points to the DVD install media by default (You have nothing else, right?).

2. You boot from the netinst / business card CDs [PXE boot optional]. 
There is only enough on the disk to find a network,bootstrap a kernel and carry 
on [business card/PXE]
or to install a bare bones base system in addition [netinst - at about 
100-150MB] If your network
isn't connected, you lose (and should get an error message somewhere).

3. You boot from the DVD _and_ a network cable is found. At this point, you're 
asked whether you want to use 
the network. In Testing at the moment, I think the message is even something 
along the lines of "You're currently 
installing from a CD/DVD - do you want to use netwrok repositories?"

If you're on an isolated network / behind a firewall which doesn't allow 
Internet access / at a friend's house
and don't want their router to configure your DHCP - you might want to carry on 
using the CD/DVD. If you say "No"
to the network, you should still get the DVD as your primary apt source.

If you say yes, then the DVD entry in /etc/apt/sources.list should be commented 
out with a # as part of the final 
clean up process.

If all else fails _ALWAYS_ check the /etc/apt/sources.list file, as that should 
tell you what's what.
It is human editable and is read in order from top to bottom.

Hope this helps,

AndyC

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