Generating locales (this might take a while)...
Generation complete.
pwconv: failed to change the mode of /etc/passwd- to 0600
Using CD-ROM mount point /cdrom/
Identifying... [21fbe30dbcb9161de9db42d950656dd2-2]
Scanning disc for index files...
Found 4 package indexes, 0 source indexes, 0 translation indexes and 1 signatures
Found label 'Lubuntu 16.10 _Yakkety Yak_ - Release amd64 (20161012.1)'
This disc is called: 
'Lubuntu 16.10 _Yakkety Yak_ - Release amd64 (20161012.1)'
Copying package lists...gpgv: Signature made Wed Oct 12 19:55:40 2016 UTC
gpgv:                using DSA key 
gpgv: Good signature from "Ubuntu CD Image Automatic Signing Key <cdimage@ubuntu.com>"

Reading Package Indexes... 0%

Reading Package Indexes... Done
Writing new source list
Source list entries for this disc are:
deb cdrom:[Lubuntu 16.10 _Yakkety Yak_ - Release amd64 (20161012.1)]/ yakkety main multiverse restricted universe
Repeat this process for the rest of the CDs in your set.
W: No valid records were found.
grep: /root/etc/apt/apt.conf.d/50unattended-upgrades: No such file or directory