touch: /dev/.initramfs/lupin-waited-for-devs: No such file or directory
Generating locales (this might take a while)...
Generation complete.
grep: /root/cdrom/preseed/ubuntustudio.seed: No such file or directory
dbus-daemon[788]: [session uid=999 pid=788] Activating service name='org.gtk.vfs.Daemon' requested by ':1.0' (uid=999 pid=789 comm="" label="unconfined")
dbus-daemon[788]: [session uid=999 pid=788] Successfully activated service 'org.gtk.vfs.Daemon'
dbus-daemon[788]: [session uid=999 pid=788] Activating service name='org.gtk.vfs.Metadata' requested by ':1.0' (uid=999 pid=789 comm="" label="unconfined")
fuse: device not found, try 'modprobe fuse' first
dbus-daemon[788]: [session uid=999 pid=788] Successfully activated service 'org.gtk.vfs.Metadata'

(gvfsd-metadata:800): GUdev-CRITICAL **: 14:32:07.709: g_udev_device_has_property: assertion 'G_UDEV_IS_DEVICE (device)' failed

(gvfsd-metadata:800): GUdev-CRITICAL **: 14:32:07.709: 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... [d7f13aeed165ec0ea2144b231896806e-2]
Scanning disc for index files...
Found 4 package indexes, 0 source indexes, 0 translation indexes and 1 signatures
Found label 'Ubuntu-MATE 18.04.1 LTS _Bionic Beaver_ - Release amd64 (20181101)'
This disc is called: 
'Ubuntu-MATE 18.04.1 LTS _Bionic Beaver_ - Release amd64 (20181101)'
Copying package lists...gpgv: Signature made Thu Nov  1 03:22:16 2018 UTC
gpgv:                using RSA key D94AA3F0EFE21092
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 18.04.1 LTS _Bionic Beaver_ - Release amd64 (20181101)]/ bionic main multiverse restricted universe
Repeat this process for the rest of the CDs in your set.