stdin: Not a typewriter Generating locales (this might take a while)... Generation complete. pwconv: failed to change the mode of /etc/passwd- to 0600 Using CD-ROM mount point /cdrom/ Identifying... [482cd2e33d77363147f1df9d7da60e66-2] Scanning disc for index files... Found 2 package indexes, 0 source indexes, 0 translation indexes and 1 signatures Found label 'Ubuntu 16.04.3 LTS _Xenial Xerus_ - Release amd64 (20170801)' This disc is called: 'Ubuntu 16.04.3 LTS _Xenial Xerus_ - Release amd64 (20170801)' Copying package lists...gpgv: Signature made Tue Aug 1 11:51:24 2017 UTC using RSA key ID EFE21092 gpgv: Good signature from "Ubuntu CD Image Automatic Signing Key (2012) " Reading Package Indexes... 0% Reading Package Indexes... Done Writing new source list Source list entries for this disc are: deb cdrom:[Ubuntu 16.04.3 LTS _Xenial Xerus_ - Release amd64 (20170801)]/ xenial main restricted Repeat this process for the rest of the CDs in your set.