[root@s101 /root]#sudo yum install -y https://download.postgresql.org/pub/repos/yum/reporpms/EL-7-x86_64/pgdg-redhat-repo-latest.noarch.rpmLoaded plugins: fastestmirror Repodata is over2 weeks old. Install yum-cron?Or run: yum makecache fast pgdg-redhat-repo-latest.noarch.rpm | 7.4 k...