Pardon the humor.  Just a collection of useful yum commands that are useful to have around but I don’t always remember off the top of my head.  I’ll be adding to this post over time.

How to list the files installed by a yum package

You will need ‘repoquery‘ which is part of ‘yum-utils‘.  If you don’t have ‘repoquery‘ install it first, then start using it:

# yum install yum-utils

# repoquery --list *package*

How to list/install a package from a specific repository

# yum repolist
# yum --disablerepo="*" --enablerepo="repo-name-here" list available
# yum --disablerepo="*" --enablerepo="repo-name-here" install package-name

Update (9/13/13):

Doing an update I ran across this error:

Error:  Multilib version problems found. This often means that the root
       cause is something else and multilib version checking is just
       pointing out that there is a problem. Eg.:
...
 You could try using --skip-broken to work around the problem
 You could try running: rpm -Va --nofiles --nodigest

Of course the first command that is suggested is a bad idea, I mean talk about denial!  I ran the second, which did nothing, still got the same problem.  So I did a little digging and these two yum commands seem to have corrected the problem, though they do run for a while (10-30 minutes)

# yum check
# yum distro-sync

Update (08 Oct 2015):

Hunting down some system package inconsistencies and I figured out how to list all RPM packages installed from Repo X:

yum list installed | grep @epel