Description of problem:
I was following the how to here:
https://fedoraproject.org/wiki/Livemedia-creator-_How_to_create_and_use_a_Live_CD
when mock asked for a password none would work (my user does not have a password), so I ran mock with sudo. This led to a failure with livemedia-creator. Looking at the mock manpage I found that
"To use mock, a user should become a member of the mock group", so I added my user to the mock group and everything worked fine.
I think the documentation should say after "dnf install mock" something like
"usermod -a -G mock <user>" or tell the user to add himself to the mock group.

Also here: http://lorax.readthedocs.io/en/latest/livemedia-creator.html#anaconda-image-install-no-virt
N.2 says to set SElinux to permissive, if this is still required, this should be added to the how to.


How reproducible:
Follow the example running every mock command with sudo