centos7 安装mysql 5.7

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
yum install mysql-devel
systemctl start  mysqld.service
systemctl status mysqld.service
grep "password" /var/log/mysqld.log
mysql -uroot -p
set global validate_password_policy=0;
set global validate_password_length=1;
ALTER USER 'root'@'localhost' IDENTIFIED BY '123456';