#下载mysql源安装包 shell> wget http://dev.mysql.com/get/mysql57-community-release-el7-8.noarch.rpm
#安装mysql源shell> yum localinstall mysql57-community-release-el7-8.noarch.rpm
检查mysql源是否安装成功 shell> yum repolist enabled | grep “mysql.-community.”
看到上图所示表示安装成功。
2、安装MySQL shell> yum install mysql-community-server
3、启动MySQL服务 shell> service mysqld start
4、查看MySQL的启动状态 shell> systemctl status mysqld 显示active
5、开机启动 shell> systemctl enable mysqldshell> systemctl daemon-reload
6、修改root本地登录密码 mysql安装完成之后，在/var/log/mysqld.log文件中给root生成了一个默认密码。通过下面的方式找到root默认密码，然后登录mysql进行修改： shell> grep ‘temporary password’ /var/log/mysqld.log
如果没有结果，删除原来安装过的mysql残留的数据（这一步非常重要，问题就出在这）
rm -rf /var/lib/mysql
重启mysqld服务 systemctl restart mysqld
7、登录后修改root密码 use mysql; ALTER USER ‘root’@‘localhost’ IDENTIFIED BY ‘root’; 执行flush privileges;
8、设置远程连接，允许root用户以root密码在各节点上登录
GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY 'admin123' WITH GRANT OPTION; flush privileges; Service mysqld restart //重启mysql