下载命令：

wget https://yum.oracle.com/repo/OracleLinux/OL6/MySQL57_community/x86_64/getPackage/mysql-community-client-5.7.22-1.el6.x86_64.rpm
wget https://yum.oracle.com/repo/OracleLinux/OL6/MySQL57_community/x86_64/getPackage/mysql-community-common-5.7.22-1.el6.x86_64.rpm
wget https://yum.oracle.com/repo/OracleLinux/OL6/MySQL57_community/x86_64/getPackage/mysql-community-libs-5.7.22-1.el6.x86_64.rpm
wget https://yum.oracle.com/repo/OracleLinux/OL6/MySQL57_community/x86_64/getPackage/mysql-community-server-5.7.22-1.el6.x86_64.rpm

rpm安装命令：

rpm -ivh mysql-community-client-5.7.22-1.el6.x86_64.rpm mysql-community-common-5.7.22-1.el6.x86_64.rpm mysql-community-libs-5.7.22-1.el6.x86_64.rpm