stdin: error 0 /init: line 7: can't open /dev/sr0: No medium found /init: line 7: can't open /dev/sr0: No medium found stdin: error 0 stdin: error 0 stdin: error 0 umount: can't umount /cdrom: Device or resource busy /init: line 7: can't open /dev/sr0: No medium found stdin: error 0 /init: line 7: can't open /dev/sr0: No medium found stdin: error 0 umount: can't umount /cdrom: Device or resource busy /init: line 7: can't open /dev/sr0: No medium found stdin: error 0 /init: line 7: can't open /dev/sr0: No medium found stdin: error 0 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. ln: accessing `1c7314a2': Input/output error pwck: cannot lock /etc/passwd; try again later. pwconv: cannot lock /etc/passwd; try again later. usermod: cannot lock /etc/passwd; try again later. /usr/lib/python2.7/dist-packages/LanguageSelector/LocaleInfo.py:256: UserWarning: Failed to connect to socket /var/run/dbus/system_bus_socket: No such file or directory warnings.warn(msg.args[0].encode('UTF-8')) Using CD-ROM mount point /cdrom/ Identifying.. [858ed23ea73e9c268aabf0108fd5b360-2] Scanning disc for index files.. Found 2 package indexes, 0 source indexes, 0 translation indexes and 1 signatures This disc is called: 'Ubuntu 12.04.3 LTS _Precise Pangolin_ - Release i386 (20130820.1)' Copying package lists...gpgv: Signature made Tue Aug 20 19:10:11 2013 BST 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 12.04.3 LTS _Precise Pangolin_ - Release i386 (20130820.1)]/ precise main restricted Repeat this process for the rest of the CDs in your set. W: Skipping nonexistent file /cdrom/dists/precise/main/binary-i386/Packages W: Skipping nonexistent file /cdrom/dists/precise/restricted/binary-i386/Packages chmod: /root/usr/sbin/update-initramfs: No such file or directory