CentOS7安装MySQL5.7

安装mysql源：

yum -y localinstall http://dev.mysql.com/get/mysql57-community-release-el7-7.noarch.rpm

安装mysql-5.7：

yum -y install mysql-community-server mysql-community-devel

启动mysql：

systemctl start mysqld
systemctl enable mysqld

查看mysql的随机密码：

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

进入mysql更改密码：

mysql -uroot -p'eZa?x2q;&;l%'

#密码设置为redhat
set global validate_password_policy=0;
set global validate_password_length=1;
ALTER USER 'root'@'localhost' IDENTIFIED BY 'redhat';