The disk contains an unclean file system (0, 0). The file system wasn't safely closed on Windows. Fixing. stdin: Not a typewriter The disk contains an unclean file system (0, 0). The file system wasn't safely closed on Windows. Fixing. The disk contains an unclean file system (0, 0). The file system wasn't safely closed on Windows. Fixing. The disk contains an unclean file system (0, 0). The file system wasn't safely closed on Windows. Fixing. The disk contains an unclean file system (0, 0). The file system wasn't safely closed on Windows. Fixing. Generating locales (this might take a while)... Generation complete. chroot: can't execute 'glib-compile-schemas': No such file or directory pwconv: failed to change the mode of /etc/passwd- to 0600 ln: /root/usr/lib/update-notifier/apt-check: No such file or directory Using CD-ROM mount point /cdrom/ Identifying... [87ff5b44305bfa89dd0b6af8851e4af8-2] Scanning disc for index files... Found 4 package indexes, 0 source indexes, 0 translation indexes and 1 signatures Found label 'Kubuntu 16.04 LTS _Xenial Xerus_ - Beta amd64 (20160323)' This disc is called: 'Kubuntu 16.04 LTS _Xenial Xerus_ - Beta amd64 (20160323)' Copying package lists...gpgv: Signature made Wed Mar 23 08:35:55 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:[Kubuntu 16.04 LTS _Xenial Xerus_ - Beta amd64 (20160323)]/ xenial main multiverse restricted universe Repeat this process for the rest of the CDs in your set.