stdin: Not a typewriter 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... done Generation complete. pwconv: failed to change the mode of /etc/passwd- to 0600 ln: /root/usr/sbin/anacron: File exists Using CD-ROM mount point /cdrom/ Identifying... [fbf14a4e93afebca4fee53244a731d6a-2] Scanning disc for index files... Found 2 package indexes, 0 source indexes, 0 translation indexes and 1 signatures Found label 'Ubuntu 15.04 _Vivid Vervet_ - Alpha amd64 (20150112)' This disc is called: 'Ubuntu 15.04 _Vivid Vervet_ - Alpha amd64 (20150112)' Copying package lists...gpgv: Signature made Mon Jan 12 07:58:16 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:[Ubuntu 15.04 _Vivid Vervet_ - Alpha amd64 (20150112)]/ vivid main restricted Repeat this process for the rest of the CDs in your set.