Comment 36 for bug 1783129

Brand new to the site so unsure if I am posting correctly

Having the same problem as reported by Kevin Golding on 2018-08-24 (Bug #1788835)

The message following "apt install krb5-user" is:
Package krb5-user is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source

The file used is ubuntu-18.04.1-live-server-amd64.iso and was downloaded Thursday 20th September 2018