/init: line 7: can't open /dev/sdb: No medium found /init: line 7: can't open /dev/sdb: No medium found dbus-daemon[833]: [session uid=999 pid=833] Activating service name='org.gtk.vfs.Daemon' requested by ':1.0' (uid=999 pid=834 comm="" label="unconfined") dbus-daemon[833]: [session uid=999 pid=833] Successfully activated service 'org.gtk.vfs.Daemon' dbus-daemon[833]: [session uid=999 pid=833] Activating service name='org.gtk.vfs.Metadata' requested by ':1.0' (uid=999 pid=834 comm="" label="unconfined") fuse: device not found, try 'modprobe fuse' first dbus-daemon[833]: [session uid=999 pid=833] Successfully activated service 'org.gtk.vfs.Metadata' (gvfsd-metadata:845): GUdev-CRITICAL **: 14:43:01.342: g_udev_device_has_property: assertion 'G_UDEV_IS_DEVICE (device)' failed (gvfsd-metadata:845): GUdev-CRITICAL **: 14:43:01.342: 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... [6331823de40809c76f2d225f4c2f5a93-2] Scanning disc for index files... Found 4 package indexes, 0 source indexes, 0 translation indexes and 1 signatures Found label 'Lubuntu 18.04.4 LTS _Bionic Beaver_ - Release amd64 (20200203)' This disc is called: 'Lubuntu 18.04.4 LTS _Bionic Beaver_ - Release amd64 (20200203)' Copying package lists...gpgv: Signature made Mon Feb 3 18:55:12 2020 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:[Lubuntu 18.04.4 LTS _Bionic Beaver_ - Release amd64 (20200203)]/ bionic main multiverse restricted universe Repeat this process for the rest of the CDs in your set. grep: /root/etc/apt/apt.conf.d/50unattended-upgrades: No such file or directory