unable to open '/dev/dm-0'
unable to open '/dev/sda'
unable to open '/dev/sdb'
umount: can't umount /cdrom: Device or resource busy
/init: line 7: can't open /dev/sr0: No medium found
/init: line 7: can't open /dev/sr0: No medium found
umount: can't umount /cdrom: Device or resource busy
/init: line 7: can't open /dev/sr0: No medium found
/init: line 7: can't open /dev/sr0: No medium found
umount: can't umount /cdrom: Device or resource busy
/init: line 7: can't open /dev/sr0: No medium found
Generating locales...
  en_US.UTF-8... up-to-date
Generation complete.
Resetting /etc/default/keyboard
adduser: The user `kubuntu' already exists.
Using CD-ROM mount point /cdrom/
Identifying.. [9504171d6f0bd1821df8fa61a685cc9b-2]
Scanning disc for index files..
Found 5 package indexes, 0 source indexes, 0 translation indexes and 1 signatures
Found label 'Kubuntu 13.04 _Raring Ringtail_ - Release amd64 (20130424)'
This disc is called: 
'Kubuntu 13.04 _Raring Ringtail_ - Release amd64 (20130424)'
Copying package lists...gpgv: Signature made Wed Apr 24 15:12:16 2013 MeST 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... 7%

Reading Package Indexes... Done
Writing new source list
Source list entries for this disc are:
deb cdrom:[Kubuntu 13.04 _Raring Ringtail_ - Release amd64 (20130424)]/ pool/restricted/b/bcmwl/
deb cdrom:[Kubuntu 13.04 _Raring Ringtail_ - Release amd64 (20130424)]/ raring main multiverse restricted universe
Repeat this process for the rest of the CDs in your set.