Notes on missing packages due to missing repositories

On RHEL7,

perl-XML-Simple-2.20-5.el7.noarch : Easy API to maintain XML in Perl
Repo        : @rhel-x86_64-workstation-optional-7

So we need the “optional” repo turned on. Here is a hint on how to do that.

https://access.redhat.com/documentation/en-us/red_hat_subscription_management/1/html/rhsm/supplementary-repos

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