passwd: password expiry information changed.
dbus-daemon[642]: [session uid=999 pid=642] Activating service name='org.gtk.vfs.Daemon' requested by ':1.0' (uid=999 pid=643 comm="" label="unconfined")
dbus-daemon[642]: [session uid=999 pid=642] Successfully activated service 'org.gtk.vfs.Daemon'
dbus-daemon[642]: [session uid=999 pid=642] Activating service name='org.gtk.vfs.Metadata' requested by ':1.0' (uid=999 pid=643 comm="" label="unconfined")
fuse: device not found, try 'modprobe fuse' first
dbus-daemon[642]: [session uid=999 pid=642] Successfully activated service 'org.gtk.vfs.Metadata'
A connection to the bus can't be made
Using CD-ROM mount point /cdrom/
Identifying... [578da59d0072df12fd5bb6677500ca00-2]
Scanning disc for index files...
Found 4 package indexes, 0 source indexes, 0 translation indexes and 1 signatures
Found label 'Ubuntu-MATE 21.04 _Hirsute Hippo_ - Beta amd64 (20210407.1)'
This disc is called: 
'Ubuntu-MATE 21.04 _Hirsute Hippo_ - Beta amd64 (20210407.1)'
Copying package lists...gpgv: Signature made Wed Apr  7 22:37:27 2021 UTC
gpgv:                using RSA key 843938DF228D22F7B3742BC0D94AA3F0EFE21092
gpgv: Good signature from "Ubuntu CD Image Automatic Signing Key (2012) <cdimage@ubuntu.com>"

Reading Package Indexes... 0%

Reading Package Indexes... Done
Writing new source list
Source list entries for this disc are:
deb cdrom:[Ubuntu-MATE 21.04 _Hirsute Hippo_ - Beta amd64 (20210407.1)]/ hirsute main multiverse restricted universe
Repeat this process for the rest of the CDs in your set.