mount: mounting /dev/sdb3 on /cdrom failed: Invalid argument passwd: password expiry information changed. dbus-daemon[1175]: [session uid=999 pid=1175] Activating service name='org.gtk.vfs.Daemon' requested by ':1.0' (uid=999 pid=1176 comm="" label="unconfined") dbus-daemon[1175]: [session uid=999 pid=1175] Successfully activated service 'org.gtk.vfs.Daemon' dbus-daemon[1175]: [session uid=999 pid=1175] Activating service name='org.gtk.vfs.Metadata' requested by ':1.0' (uid=999 pid=1176 comm="" label="unconfined") fuse: device not found, try 'modprobe fuse' first dbus-daemon[1175]: [session uid=999 pid=1175] Successfully activated service 'org.gtk.vfs.Metadata' A connection to the bus can't be made Using CD-ROM mount point /cdrom/ Identifying... [ae8afac6af031c3be6d4e31b8fbfb3a4-2] Scanning disc for index files... Found 4 package indexes, 0 source indexes, 0 translation indexes and 1 signatures Found label 'Ubuntu-MATE 22.04 LTS _Jammy Jellyfish_ - Release amd64 (20220419)' This disc is called: 'Ubuntu-MATE 22.04 LTS _Jammy Jellyfish_ - Release amd64 (20220419)' Copying package lists...gpgv: Signature made Tue Apr 19 10:21:32 2022 UTC gpgv: using RSA key 843938DF228D22F7B3742BC0D94AA3F0EFE21092 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-MATE 22.04 LTS _Jammy Jellyfish_ - Release amd64 (20220419)]/ jammy main multiverse restricted universe Repeat this process for the rest of the CDs in your set.