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

报错：The GPG keys listed for the "MySQL 5.7 Community Server" repository are already installed but they are not correct for this package.
Check that the correct key URLs are configured for this repository.
解决：

rpm --import https://repo.mysql.com/RPM-GPG-KEY-mysql-2022

重新安装

yum -y install mysql-community-server

启动MYSQL

systemctl start  mysqld

设置开机自启

systemctl enable mysqld

获取mysql默认密码

grep "password" /var/log/mysqld.log

修改密码

ALTER USER 'root'@'localhost' IDENTIFIED BY '密码';