I am trying to migratean existing RHEL 6 machine to Centos 6.
I followed the instructions in https://wiki.centos.org/HowTos/MigrationGuide
I run into problems:
when I run
yum upgrade
then yum tries to access a repository rhel-6-server-extras-rpms
and then fails.
What can I do that yum no longer tries to access this repository?