unable to open '/dev/sda'
unable to open '/dev/sda'
Generating locales (this might take a while)...
Generation complete.
pwconv: failed to change the mode of /etc/passwd- to 0600
Activating service name='org.gtk.vfs.Daemon'
Successfully activated service 'org.gtk.vfs.Daemon'
Activating service name='org.gtk.vfs.Metadata'
fuse: device not found, try 'modprobe fuse' first
Successfully activated service 'org.gtk.vfs.Metadata'
A connection to the bus can't be made
Using CD-ROM mount point /cdrom/
Identifying... [0ddb8211560e677df0dd7dcf06e0cdde-2]
Scanning disc for index files...
Found 2 package indexes, 0 source indexes, 0 translation indexes and 1 signatures
Found label 'Ubuntu 17.10 _Artful Aardvark_ - Alpha amd64 (20170926)'
This disc is called: 
'Ubuntu 17.10 _Artful Aardvark_ - Alpha amd64 (20170926)'
Copying package lists...gpgv: Signature made Tue Sep 26 20:40:36 2017 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:[Ubuntu 17.10 _Artful Aardvark_ - Alpha amd64 (20170926)]/ artful main restricted
Repeat this process for the rest of the CDs in your set.