yum install https://download.postgresql.org/pub/repos/yum/9.6/redhat/rhel-7-x86_64/pgdg-centos96-9.6-3.noarch.rpm yum install postgresql96-server postgresql96-contrib /usr/pgsql-9.6/bin/postgresql96-setup initd

【精简步骤】 su yum intall mysql yum install mariadb-server mariadb systemctl start mariadb systemctl enable mariadb yum install mysql-devel firewall-cmd --zone=public --add-port=3306/tcp --permanent ……