安装mysql5.7（yum安装阿里云）

wget 'https://dev.mysql.com/get/mysql57-community-release-el7-11.noarch.rpm'
rpm -Uvh mysql57-community-release-el7-11.noarch.rpm
yum repolist all | grep mysql
yum install -y mysql-community-server
systemctl start mysqld
systemctl status mysqld
grep 'temporary password' /var/log/mysqld.log
mysql -uroot -p
#修改密码验证等级
set global validate_password_policy=LOW;
SET PASSWORD = PASSWORD('Dyh712155');
GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY 'Admin123!' WITH GRANT OPTION;

flush privileges;