1、添加yum库
sudo yum install -y https://repo.mysql.com/mysql80-community-release-el7-3.noarch.rpm
2、导入 mysql GPG公钥 失效的：sudo rpm --import https://repo.mysql.com/RPM-GPG-KEY-mysql
rpm --import https://repo.mysql.com/RPM-GPG-KEY-mysql-2022
3、安装mysql8 ， sudo yum install -y mysql-community-server --nogpgcheck方式可以跳过第二步
sudo yum install -y mysql-community-server
4、启动 MySQL 服务
sudo systemctl start mysqld
5、设置开机自启动
sudo systemctl enable mysqld
6、查看root初始密码
sudo grep 'temporary password' /var/log/mysqld.log
7、查看msyql状态
sudo systemctl status mysqld
8、修改密码
#密码查看第6步 mysql -u root -p
#设置密码
ALTER USER 'root'@'localhost' IDENTIFIED BY '新密码';
#刷新权限
FLUSH PRIVILEGES;