root@ltsp:/# apt-get update
Ign cdrom://Ubuntu 8.10 _Intrepid Ibex_ - Release i386 (20081028) intrepid Release.gpg
Ign cdrom://Ubuntu 8.10 _Intrepid Ibex_ - Release i386 (20081028) intrepid/main Translation-en_GB
Ign cdrom://Ubuntu 8.10 _Intrepid Ibex_ - Release i386 (20081028) intrepid/restricted Translation-en_GB
Ign cdrom://Ubuntu 8.10 _Intrepid Ibex_ - Release i386 (20081028) intrepid Release
Ign cdrom://Ubuntu 8.10 _Intrepid Ibex_ - Release i386 (20081028) intrepid/main Packages
Ign cdrom://Ubuntu 8.10 _Intrepid Ibex_ - Release i386 (20081028) intrepid/restricted Packages
Err cdrom://Ubuntu 8.10 _Intrepid Ibex_ - Release i386 (20081028) intrepid/main Packages
  Please use apt-cdrom to make this CD-ROM recognized by APT. apt-get update cannot be used to add new CD-ROMs
Err cdrom://Ubuntu 8.10 _Intrepid Ibex_ - Release i386 (20081028) intrepid/restricted Packages
  Please use apt-cdrom to make this CD-ROM recognized by APT. apt-get update cannot be used to add new CD-ROMs
Err http://security.ubuntu.com intrepid-security Release.gpg                 
  Could not resolve ‘security.ubuntu.com’
Err http://security.ubuntu.com intrepid-security/main Translation-en_GB      
  Could not resolve ‘security.ubuntu.com’
Err http://security.ubuntu.com intrepid-security/restricted Translation-en_GB
  Could not resolve ‘security.ubuntu.com’
Err http://security.ubuntu.com intrepid-security/universe Translation-en_GB
  Could not resolve ‘security.ubuntu.com’
Err http://security.ubuntu.com intrepid-security/multiverse Translation-en_GB
  Could not resolve ‘security.ubuntu.com’
Err http://gb.archive.ubuntu.com intrepid Release.gpg
  Could not resolve ‘gb.archive.ubuntu.com’
Err http://gb.archive.ubuntu.com intrepid/main Translation-en_GB
  Could not resolve ‘gb.archive.ubuntu.com’
Err http://gb.archive.ubuntu.com intrepid/restricted Translation-en_GB
  Could not resolve ‘gb.archive.ubuntu.com’
Err http://gb.archive.ubuntu.com intrepid/universe Translation-en_GB
  Could not resolve ‘gb.archive.ubuntu.com’
Err http://gb.archive.ubuntu.com intrepid/multiverse Translation-en_GB
  Could not resolve ‘gb.archive.ubuntu.com’
Err http://gb.archive.ubuntu.com intrepid-updates Release.gpg
  Could not resolve ‘gb.archive.ubuntu.com’
Err http://gb.archive.ubuntu.com intrepid-updates/main Translation-en_GB
  Could not resolve ‘gb.archive.ubuntu.com’
Err http://gb.archive.ubuntu.com intrepid-updates/restricted Translation-en_GB
  Could not resolve ‘gb.archive.ubuntu.com’
Err http://gb.archive.ubuntu.com intrepid-updates/universe Translation-en_GB
  Could not resolve ‘gb.archive.ubuntu.com’
Err http://gb.archive.ubuntu.com intrepid-updates/multiverse Translation-en_GB
  Could not resolve ‘gb.archive.ubuntu.com’
Reading package lists... Done
W: Failed to fetch http://gb.archive.ubuntu.com/ubuntu/dists/intrepid/Release.gpg  Could not resolve ‘gb.archive.ubuntu.com’

W: Failed to fetch http://gb.archive.ubuntu.com/ubuntu/dists/intrepid/main/i18n/Translation-en_GB.bz2  Could not resolve ‘gb.archive.ubuntu.com’

W: Failed to fetch http://gb.archive.ubuntu.com/ubuntu/dists/intrepid/restricted/i18n/Translation-en_GB.bz2  Could not resolve ‘gb.archive.ubuntu.com’

W: Failed to fetch http://gb.archive.ubuntu.com/ubuntu/dists/intrepid/universe/i18n/Translation-en_GB.bz2  Could not resolve ‘gb.archive.ubuntu.com’

W: Failed to fetch http://gb.archive.ubuntu.com/ubuntu/dists/intrepid/multiverse/i18n/Translation-en_GB.bz2  Could not resolve ‘gb.archive.ubuntu.com’

W: Failed to fetch http://gb.archive.ubuntu.com/ubuntu/dists/intrepid-updates/Release.gpg  Could not resolve ‘gb.archive.ubuntu.com’

W: Failed to fetch http://gb.archive.ubuntu.com/ubuntu/dists/intrepid-updates/main/i18n/Translation-en_GB.bz2  Could not resolve ‘gb.archive.ubuntu.com’

W: Failed to fetch http://gb.archive.ubuntu.com/ubuntu/dists/intrepid-updates/restricted/i18n/Translation-en_GB.bz2  Could not resolve ‘gb.archive.ubuntu.com’

W: Failed to fetch http://gb.archive.ubuntu.com/ubuntu/dists/intrepid-updates/universe/i18n/Translation-en_GB.bz2  Could not resolve ‘gb.archive.ubuntu.com’

W: Failed to fetch http://gb.archive.ubuntu.com/ubuntu/dists/intrepid-updates/multiverse/i18n/Translation-en_GB.bz2  Could not resolve ‘gb.archive.ubuntu.com’

W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/intrepid-security/Release.gpg  Could not resolve ‘security.ubuntu.com’

W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/intrepid-security/main/i18n/Translation-en_GB.bz2  Could not resolve ‘security.ubuntu.com’

W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/intrepid-security/restricted/i18n/Translation-en_GB.bz2  Could not resolve ‘security.ubuntu.com’

W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/intrepid-security/universe/i18n/Translation-en_GB.bz2  Could not resolve ‘security.ubuntu.com’

W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/intrepid-security/multiverse/i18n/Translation-en_GB.bz2  Could not resolve ‘security.ubuntu.com’

W: Failed to fetch cdrom:[Ubuntu 8.10 _Intrepid Ibex_ - Release i386 (20081028)]/dists/intrepid/main/binary-i386/Packages.gz  Please use apt-cdrom to make this CD-ROM recognized by APT. apt-get update cannot be used to add new CD-ROMs

W: Failed to fetch cdrom:[Ubuntu 8.10 _Intrepid Ibex_ - Release i386 (20081028)]/dists/intrepid/restricted/binary-i386/Packages.gz  Please use apt-cdrom to make this CD-ROM recognized by APT. apt-get update cannot be used to add new CD-ROMs

W: Some index files failed to download, they have been ignored, or old ones used instead.
W: You may want to run apt-get update to correct these problems
root@ltsp:/# ls -l  /etc/apt/apt.conf.d/
total 12
-rw-r--r-- 1 root root 165 2008-08-14 17:55 01autoremove
-rw-r--r-- 1 root root   9 2008-08-14 17:55 01ubuntu
-rw-r--r-- 1 root root 182 2008-10-10 11:32 70debconf
root@ltsp:/# ls -l  /etc/apt/
total 36
drwxr-xr-x 2 root root 4096 2009-03-17 18:46 apt.conf.d
-rw------- 1 root root    0 2009-03-17 18:46 secring.gpg
-rw-r--r-- 1 root root 3112 2009-03-17 18:48 sources.list
drwxr-xr-x 2 root root 4096 2008-08-14 17:55 sources.list.d
-rw-r--r-- 1 root root   51 2009-03-17 18:46 sources.list.old
-rw------- 1 root root 1200 2009-03-17 18:46 trustdb.gpg
-rw-r--r-- 1 root root 6713 2009-03-17 18:46 trusted.gpg
-rw-r--r-- 1 root root 6713 2009-03-17 18:46 trusted.gpg~