1.
wget https://dev.mysql.com/get/mysql57-community-release-el7-8.noarch.rpm
2.
rpm -ivh mysql57-community-release-el7-8.noarch.rpm
3.
cd /etc/yum.repos.d
rpm --import https://repo.mysql.com/RPM-GPG-KEY-mysql-2022
yum -y install mysql-server
4.
systemctl start mysqld
5. 获取默认登录密码
grep 'A temporary password' /var/log/mysqld.log
6. 登录
mysql -u root -p
回车，提示输入密码，输入刚才的默认密码，回车。
7. 重新设置登录密码（可选操作）
set global validate_password_policy=LOW;
set global validate_password_length=6;
ALTER USER USER() IDENTIFIED BY '123456';
8. 配置远程登录权限
GRANT ALL PRIVILEGES ON *.* TO root@'%' IDENTIFIED BY '123456' WITH GRANT OPTION;
FLUSH PRIVILEGES;
exit
可参考：【超详细】CentOS 7安装MySQL 5.7【安装及密码配置、字符集配置、远程连接配置】_mysql contos 密码配置文件-CSDN博客
