incmplt SERV-OPS サバ缶どん is a user on mstdn.serv-ops.com. You can follow them or interact with them if you have an account anywhere in the fediverse.
CentOS6のサポートが切れて検証用のCentOS6のyumも使えなくなったので…暫定的に対応でリポジトリをvaultに変更。
https://serv-ops.com/blog/2020/12/22/centos-6-yum-error-vault-repo/