stdin: Invalid argument stdin: Not a typewriter stdin: Invalid argument stdin: Not a typewriter /init: line 7: can't open /dev/sr0: No medium found /init: line 7: can't open /dev/sr0: No medium found stdin: Invalid argument stdin: Not a typewriter stdin: Invalid argument 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... [67c363ef778325e7a0f540cf034dc23e-2] Scanning disc for index files... Found 4 package indexes, 0 source indexes, 0 translation indexes and 1 signatures Found label 'Ubuntu-MATE 16.04.1 LTS _Xenial Xerus_ - Beta amd64 (20160919)' This disc is called: 'Ubuntu-MATE 16.04.1 LTS _Xenial Xerus_ - Beta amd64 (20160919)' Copying package lists...gpgv: Signature made Mon Sep 19 05:10:16 2016 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-MATE 16.04.1 LTS _Xenial Xerus_ - Beta amd64 (20160919)]/ xenial main multiverse restricted universe Repeat this process for the rest of the CDs in your set.