gio: Setting attribute metadata::trusted not supported
ln: /root/usr/lib/update-notifier/apt-check: No such file or directory
Using CD-ROM mount point /cdrom/
Identifying... [a42ee9bc9208931ac1d24ac19e50b80d-2]
Scanning disc for index files...
Found 4 package indexes, 0 source indexes, 0 translation indexes and 1 signatures
Found label 'Kubuntu 18.04 LTS _Bionic Beaver_ - Alpha amd64 (20180220)'
This disc is called: 
'Kubuntu 18.04 LTS _Bionic Beaver_ - Alpha amd64 (20180220)'
Copying package lists...gpgv: Signature made Tue Feb 20 05:50:56 2018 UTC
gpgv:                using RSA key 
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:[Kubuntu 18.04 LTS _Bionic Beaver_ - Alpha amd64 (20180220)]/ bionic main multiverse restricted universe
Repeat this process for the rest of the CDs in your set.