一、安装mysql

1. 下载安装源

wget https://dev.mysql.com/get/mysql57-community-release-el7-8.noarch.rpm
rpm -ivh mysql57-community-release-el7-8.noarch.rpm

2. 安装mysql

rpm --import https://repo.mysql.com/RPM-GPG-KEY-mysql-2022
yum -y install mysql-server

3. 启动mysql

systemctl start mysqld

4. 修改mysql密码

# 查看临时密码
grep 'temporary password' /var/log/mysqld.log

mysql -uroot -p

set global validate_password_policy=LOW;
ALTER USER 'root'@'localhost' IDENTIFIED BY '修改的密码'; 

5. 允许任何人连接

use mysql;
update user set Host='%' where User='root';
flush privileges;