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... [83d0a8ae36730f46e07da45d7dbbae39-2] Scanning disc for index files... Found 8 package indexes, 0 source indexes, 0 translation indexes and 2 signatures Found label 'Xubuntu 15.10 _Wily Werewolf_ - Alpha amd64 (20150703)' This disc is called: 'Xubuntu 15.10 _Wily Werewolf_ - Alpha amd64 (20150703)' Copying package lists...gpgv: Signature made Fri Apr 10 10:18:20 2015 UTC using DSA key ID FBB75451 gpgv: Good signature from "Ubuntu CD Image Automatic Signing Key " gpgv: Signature made Fri Jul 3 10:12:34 2015 UTC using DSA key ID FBB75451 gpgv: Good signature from "Ubuntu CD Image Automatic Signing Key " Reading Package Indexes... 0% Reading Package Indexes... Done Writing new source list Source list entries for this disc are: deb cdrom:[Xubuntu 15.10 _Wily Werewolf_ - Alpha amd64 (20150703)]/ vivid main multiverse restricted universe deb cdrom:[Xubuntu 15.10 _Wily Werewolf_ - Alpha amd64 (20150703)]/ wily main multiverse restricted universe Repeat this process for the rest of the CDs in your set.