/init: line 7: can't open /dev/sr0: No medium found /init: line 7: can't open /dev/sr0: No medium found /init: line 7: can't open /dev/sr0: No medium found /init: line 7: can't open /dev/sr0: No medium found /init: line 7: can't open /dev/sr0: No medium found /init: line 7: can't open /dev/sr0: No medium found /init: line 7: can't open /dev/sr0: No medium found /init: line 7: can't open /dev/sr0: No medium found /init: line 7: can't open /dev/sr0: No medium found /init: line 7: can't open /dev/sr0: No medium found dbus-daemon[945]: [session uid=999 pid=945] Activating service name='org.gtk.vfs.Daemon' requested by ':1.0' (uid=999 pid=946 comm="" label="unconfined") dbus-daemon[945]: [session uid=999 pid=945] Successfully activated service 'org.gtk.vfs.Daemon' dbus-daemon[945]: [session uid=999 pid=945] Activating service name='org.gtk.vfs.Metadata' requested by ':1.0' (uid=999 pid=946 comm="" label="unconfined") fuse: device not found, try 'modprobe fuse' first dbus-daemon[945]: [session uid=999 pid=945] Successfully activated service 'org.gtk.vfs.Metadata' A connection to the bus can't be made Using CD-ROM mount point /cdrom/ Identifying... [04518aecf7ed97e992772dac4c99eaf9-2] Scanning disc for index files... Found 2 package indexes, 0 source indexes, 0 translation indexes and 1 signatures Found label 'Ubuntu 19.04 _Disco Dingo_ - Alpha amd64 (20190305.1)' This disc is called: 'Ubuntu 19.04 _Disco Dingo_ - Alpha amd64 (20190305.1)' Copying package lists...gpgv: Signature made Tue Mar 5 17:51:39 2019 UTC gpgv: using RSA key D94AA3F0EFE21092 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 19.04 _Disco Dingo_ - Alpha amd64 (20190305.1)]/ disco main restricted Repeat this process for the rest of the CDs in your set.