umount: can't umount /cdrom: Device or resource busy
umount: can't umount /cdrom: Device or resource busy
umount: can't umount /cdrom: Device or resource busy
Generating locales...
  en_US.UTF-8... up-to-date
Generation complete.
Resetting /etc/default/keyboard
adduser: The user `ubuntu' already exists.
/usr/lib/python2.7/dist-packages/LanguageSelector/LocaleInfo.py:256: UserWarning: Failed to connect to socket /var/run/dbus/system_bus_socket: No such file or directory
  warnings.warn(msg.args[0].encode('UTF-8'))
Using CD-ROM mount point /cdrom/
Identifying.. [00a6fdec33def50a50896d687bbab91b-2]
Scanning disc for index files..
Found 4 package indexes, 0 source indexes, 0 translation indexes and 1 signatures
This disc is called: 
'Ubuntu 12.04.1 LTS _Precise Pangolin_ - Release amd64 (20120823.1)'
Copying package lists...gpgv: Signature made Thu Aug 23 17:13:38 2012 UTC using DSA key ID FBB75451
gpgv: Good signature from "Ubuntu CD Image Automatic Signing Key <cdimage@ubuntu.com>"

Reading Package Indexes... 0%

Reading Package Indexes... 10%

Reading Package Indexes... Done
Writing new source list
Source list entries for this disc are:
deb cdrom:[Ubuntu 12.04.1 LTS _Precise Pangolin_ - Release amd64 (20120823.1)]/ dists/precise/main/binary-i386/
deb cdrom:[Ubuntu 12.04.1 LTS _Precise Pangolin_ - Release amd64 (20120823.1)]/ dists/precise/restricted/binary-i386/
deb cdrom:[Ubuntu 12.04.1 LTS _Precise Pangolin_ - Release amd64 (20120823.1)]/ precise main restricted
Repeat this process for the rest of the CDs in your set.
W: Skipping nonexistent file /cdrom/dists/precise/main/binary-amd64/Packages
W: Skipping nonexistent file /cdrom/dists/precise/main/binary-i386/Packages
W: Skipping nonexistent file /cdrom/dists/precise/restricted/binary-amd64/Packages
W: Skipping nonexistent file /cdrom/dists/precise/restricted/binary-i386/Packages
ln: /root/usr/sbin/update-initramfs: File exists
chmod: /root/usr/sbin/update-initramfs: No such file or directory