1。由于CentOS的yum源中没有mysql，需要到mysql官网下载yumrepo配置文件。wgethttp://dev.mysql.com/get/mysql57-community-release-el7-9.noarch.rpm2。安装yumrepo文件rpm-ivhmysql57-community-release-el7-9.noarch.rpm执行后会在/etc/yum.repos.d/目录下生成两个repo文件mysql-community.repomysql-community-来源.repo3。然后更新yum缓存yumcleanallyummakecache4。安装mysqlyuminstallmysql-community-client.x86_64mysql-community-common.x86_64mysql-community-devel.x86_64mysql-community-libs.x86_64mysql-community-server.x86_64或rpminstallmysql-server5。启动mysqlservicemysqldstart6。查看初始密码grep'temporarypassword'/var/log/mysqld.log得到如下内容：2016-10-28T10:36:32.369073Z1【注意】为root@localhost生成一个临时密码：5Oazqgpiat!p7。使用初始密码登录mysql-uroot-p//回车，然后输入上一步找到的初始密码8.更改初始密码ALTERUSER'root'@'localhost'IDENTIFIEDBY'MyNewPass4!';//目前的mysql对密码强度要求较高，需要包含大小写字母、数字和特殊字符至此mysql-server安装完成
