dbus-daemon[770]: [session uid=999 pid=770] Activating service name='org.gtk.vfs.Daemon' requested by ':1.0' (uid=999 pid=771 comm="" label="unconfined") dbus-daemon[770]: [session uid=999 pid=770] Successfully activated service 'org.gtk.vfs.Daemon' dbus-daemon[770]: [session uid=999 pid=770] Activating service name='org.gtk.vfs.Metadata' requested by ':1.0' (uid=999 pid=771 comm="" label="unconfined") fuse: device not found, try 'modprobe fuse' first dbus-daemon[770]: [session uid=999 pid=770] Successfully activated service 'org.gtk.vfs.Metadata' (gvfsd-metadata:782): GUdev-CRITICAL **: 17:26:39.032: g_udev_device_has_property: assertion 'G_UDEV_IS_DEVICE (device)' failed (gvfsd-metadata:782): GUdev-CRITICAL **: 17:26:39.032: g_udev_device_has_property: assertion 'G_UDEV_IS_DEVICE (device)' failed A connection to the bus can't be made Using CD-ROM mount point /cdrom/ Identifying... [aae123b9509481c125327f72051133fb-2] Scanning disc for index files... Found 2 package indexes, 0 source indexes, 0 translation indexes and 1 signatures Found label 'Ubuntu 18.04 LTS _Bionic Beaver_ - Release amd64 (20180426)' This disc is called: 'Ubuntu 18.04 LTS _Bionic Beaver_ - Release amd64 (20180426)' Copying package lists...gpgv: Signature made Thu Apr 26 18:43:31 2018 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 18.04 LTS _Bionic Beaver_ - Release amd64 (20180426)]/ bionic main restricted Repeat this process for the rest of the CDs in your set.