Yum is not working producing the following error:
$ yum check-update The SSL certificate failed verification.
Cause and resolution
Please check the following causes: 1. Server time should be correct, could be checked with
ntpdate -qv pt.pool.ntp.org
2. The server should be able to resolve repo/cln websites properly, if you use custom resolvers - disable them in /etc/resolv.conf and set 18.104.22.168 :