**1、下载 Linux MySQL Yum Repository** ``` https://dev.mysql.com/downloads/repo/yum/ ``` ``` 选择下载： Red Hat Enterprise Linux 7 / Oracle Linux 7 (Architecture Independent), RPM Package ``` **2、卸载 MariaDB** ``` rpm -qa | grep mariadb 输出：mariadb-libs-5.5.52-1.el7.x86_64 rpm -e --nodeps mariadb-libs-5.5.52-1.el7.x86_64 ``` **3、安装 rpm 文件** ``` rpm -ivh mysql80-community-release-el7-1.noarch.rpm ``` **4、更新 yum 缓存** ``` yum clean all yum makecache ``` **5、查看 yum 中的 MySQL 版本** ``` yum repolist all | grep mysql ``` **6、安装 MySQL（yum会默认安装最新版本）** ``` yum install mysql-community-server ``` **8、启动 MySQL 服务** ``` systemctl start mysqld.service ``` **9、获取初始密码、修改密码** ``` cat /var/log/mysqld.log | grep password 输出：[Note] [MY-010454] [Server] A temporary password is generated for root@localhost: M6l.sDuivb,z ``` 初始密码为 root@localhost:后的一串字符 （本文为：M6l.sDuivb,z） 使用初始密码登录MySQL并修改密码（本文修改为 !G1Pwd123） MySQL 对于密码强弱有要求，最好包含大小写字母、阿拉伯数字、标点符号 ``` mysql -u root -p ALTER USER 'root'@'localhost' IDENTIFIED BY '!G1Pwd123'; ``` **10、赋予 root 所有权限** ``` GRANT ALL PRIVILEGES ON *.* TO 'root'@'localhost' WITH GRANT OPTION; FLUSH PRIVILEGES; ``` **11、赋予 root 所有主机访问权限，并设置密码** ``` CREATE USER 'root'@'%' IDENTIFIED BY '!G1Pwd123'; GRANT ALL PRIVILEGES ON *.* to 'root'@'%'; FLUSH PRIVILEGES; ``` **12、配置阿里云安全组**  *****  *****  *****  ``` 授权对象：0.0.0.0/0 重新启动服务器 ```  **12、删除 rpm 文件** ``` cd / rm -rf mysql80-community-release-el7-1.noarch.rpm ``` **13、安装及配置完成**