安装mysql5.7 卸载默认mariadb rpm–qa| grep mairadb rpm–e –nodepsmariadb-libs-5.5.56-2.el7.x86_64 下载软件并上传到服务器 安装 –vxfmysql-5.7.20-1.el7.x86_64.rpm-bundle.tar rpm -ivh mysql-community-common-5.7.20-1.el7.x86_64.rpm mysql-community-com