Generating locales...
  en_US.UTF-8... done
Generation complete.
pwconv: failed to change the mode of /etc/passwd- to 0600
Using CD-ROM mount point /cdrom/
Identifying.. [e1fa675c55f11de8d1949a92eeb64a98-2]
Scanning disc for index files..
Found 4 package indexes, 0 source indexes, 0 translation indexes and 1 signatures
Found label 'Lubuntu 13.04 _Raring Ringtail_ - Alpha amd64 (20130212)'
This disc is called: 
'Lubuntu 13.04 _Raring Ringtail_ - Alpha amd64 (20130212)'
Copying package lists...gpgv: Signature made Tue Feb 12 17:40:33 2013 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... 7%

Reading Package Indexes... Done
Writing new source list
Source list entries for this disc are:
deb cdrom:[Lubuntu 13.04 _Raring Ringtail_ - Alpha amd64 (20130212)]/ raring main multiverse restricted universe
Repeat this process for the rest of the CDs in your set.