I work with an isolated network - no Internet connection. I download the apt-mirror repository on an “outside” server, then sneaker-net the repository to the isolated network. The problem is the outside server is 32 bit and it only downloads the 32 bit binary files. The isolated network has both 32 and 64 bit Ubuntu machines. How do I get the outside server to download both 32 and 64 bit repository files?

To download specific architectures you must tell it what you want to download otherwise it will default to i386. So if you have
you need to change your configuration file like this
Of course adjust the repository location to whatever country you are in.

I'll give that a try thanks. But how do I form the source lines in mirror.list? Is it deb-i386-src or deb-src-i386?
Here is my mirror.list

# 13 December 2013
############# config ##################
#
# set base_path /var/spool/apt-mirror
#
# set mirror_path $base_path/mirror
# set skel_path $base_path/skel
# set var_path $base_path/var
# set cleanscript $var_path/clean.sh
# set defaultarch <running host architecture>
# set postmirror_script $var_path/postmirror.sh
# set run_postmirror 0
set nthreads 20
set _tilde 0
#
############# end config ##############

deb-i386 http://archive.ubuntu.com/ubuntu precise main restricted universe multiverse
deb-i386 http://archive.ubuntu.com/ubuntu precise-security main restricted universe multiverse
deb-i386 http://archive.ubuntu.com/ubuntu precise-updates main restricted universe multiverse
#deb-i386 http://archive.ubuntu.com/ubuntu precise-proposed main restricted universe multiverse
#deb-i386 http://archive.ubuntu.com/ubuntu precise-backports main restricted universe multiverse

deb-i386-src http://archive.ubuntu.com/ubuntu precise main restricted universe multiverse
deb-i386-src http://archive.ubuntu.com/ubuntu precise-security main restricted universe multiverse
deb-i386-src http://archive.ubuntu.com/ubuntu precise-updates main restricted universe multiverse
#deb-i386-src http://archive.ubuntu.com/ubuntu precise-proposed main restricted universe multiverse
#deb-i386-src http://archive.ubuntu.com/ubuntu precise-backports main restricted universe multiverse

deb-amd64 http://archive.ubuntu.com/ubuntu precise main restricted universe multiverse
deb-amd64 http://archive.ubuntu.com/ubuntu precise-security main restricted universe multiverse
deb-amd64 http://archive.ubuntu.com/ubuntu precise-updates main restricted universe multiverse
#deb-amd64 http://archive.ubuntu.com/ubuntu precise-proposed main restricted universe multiverse
#deb-amd64 http://archive.ubuntu.com/ubuntu precise-backports main restricted universe multiverse

deb-amd64-src http://archive.ubuntu.com/ubuntu precise main restricted universe multiverse
deb-amd64-src http://archive.ubuntu.com/ubuntu precise-security main restricted universe multiverse
deb-amd64-src http://archive.ubuntu.com/ubuntu precise-updates main restricted universe multiverse
#deb-amd64-src http://archive.ubuntu.com/ubuntu precise-proposed main restricted universe multiverse
#deb-amd64-src http://archive.ubuntu.com/ubuntu precise-backports main restricted universe multiverse

clean http://archive.ubuntu.com/ubuntu

Deb source is like an architecture so the lines would be

1 members found this post helpful.

That works for my 32-bit machines. My 64-bit machines are giving me errors and warnings about ppa.launchpad.net.

Err http://ppa.launchpad.net precise/main Sources
Something wicked happened resolving 'ppa.launchpad.net:http' (-5 - No address associated with hostname)

W: Failed to fetch http://ppa.launchpad.net/webupd8team...source/Sources Something wicked happened resolving 'ppa.launchpad.net:http' (-5 - No address associated with hostname)

Do I need to download and duplicate another repository or something?

The owner of that launchpad PPA may not have sources available. If that is the case you will get that error.