Using CD-ROM mount point /cdrom/
Identifying... [e82f87f9799f33bcc0cfca80c0c647e8-2]
Scanning disc for index files...
Found 1 package indexes, 0 source indexes, 0 translation indexes and 0 signatures
Found label 'Robolinux_9.2.1 16.04 - Release amd64'
This disc is called: 
'Robolinux_9.2.1 16.04 - Release amd64'
Copying package lists...
Reading Package Indexes... 0%

Reading Package Indexes... 14%

Reading Package Indexes... Done
Writing new source list
Source list entries for this disc are:
deb cdrom:[Robolinux_9.2.1 16.04 - Release amd64]/ dists/
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