stdin: Not a typewriter stdin: Not a typewriter stdin: Not a typewriter umount: can't umount /cdrom: Device or resource busy /init: line 7: can't open /dev/sr0: No medium found stdin: Not a typewriter /init: line 7: can't open /dev/sr0: No medium found stdin: Not a typewriter umount: can't umount /cdrom: Device or resource busy /init: line 7: can't open /dev/sr0: No medium found stdin: Not a typewriter /init: line 7: can't open /dev/sr0: No medium found stdin: Not a typewriter 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 `ubuntu' already exists. Using CD-ROM mount point /cdrom/ Identifying... [d965548364891d4d97e512f141d256f3-2] Scanning disc for index files... Found 2 package indexes, 0 source indexes, 0 translation indexes and 1 signatures This disc is called: 'Ubuntu 14.04 LTS _Trusty Tahr_ - Release amd64 (20140417)' Copying package lists...gpgv: Signature made Thu Apr 17 07:05:09 2014 IST 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:[Ubuntu 14.04 LTS _Trusty Tahr_ - Release amd64 (20140417)]/ trusty main restricted Repeat this process for the rest of the CDs in your set.