首先安装MySQL的Yum Repository

wget -i -c http://dev.mysql.com/get/mysql57-community-release-el7-10.noarch.rpm
yum -y install mysql57-community-release-el7-10.noarch.rpm
yum -y install mysql-community-server

启动mysql服务

systemctl start  mysqld.service

查看mysql运行状态

systemctl status mysqld.service

停止服务

systemctl stop mysqld.service

查看初始用户和密码，冒号后面的字符就是密码

grep 'temporary password' /var/log/mysqld.log

登录

mysql -u root -p

修改密码

//先更改安全策略，不然设置密码会提示密码不符合安全策略
set global validate_password_policy=0; 
set global validate_password_length=1;
//设置密码
SET PASSWORD = PASSWORD('yourpwd');

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