stdin: I/O error
stdin: I/O error
stdin: I/O error
stdin: I/O error
stdin: I/O error
stdin: I/O error
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... [3144f5b8967a2b65609b3a5f1b6a7e16-2]
Scanning disc for index files...
Found 3 package indexes, 0 source indexes, 1 translation indexes and 1 signatures
Found label 'Ubuntu 15.10 _Wily Werewolf_ - Release amd64 (20151021)'
This disc is called: 
'Ubuntu 15.10 _Wily Werewolf_ - Release amd64 (20151021)'
Copying package lists...gpgv: Signature made Wed Oct 21 16:17:25 2015 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... 1%

Reading Package Indexes... Done

Reading Translation Indexes... 0%

Reading Translation Indexes... Done
Writing new source list
Source list entries for this disc are:
deb cdrom:[Ubuntu 15.10 _Wily Werewolf_ - Release amd64 (20151021)]/ jessie main
deb cdrom:[Ubuntu 15.10 _Wily Werewolf_ - Release amd64 (20151021)]/ wily main restricted
Repeat this process for the rest of the CDs in your set.