centos7.5 https://archive.kernel.org/centos-vault/7.5.1804/isos/x86_64/ https://vault.centos.org/7.5.1804/isos/x86_64/ https://archive.kernel.org/centos-vault/7.6.1810/isos/x86_64/ https://vault.centos.org/7.6.1810/isos/x86_64/