http://repo.mysql.com/mysql57-community-release-el7.rpm

CentOS 7启用epel仓库需要反复2次输入yum install -y epel-release && yum makecache才能滚动到EPEL仓库的最新版本:

rpmkeys --import /etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7
yum install -y epel-release
yum makecache

yum install -y epel-release
yum makecache

rpmkeys --import /etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-7

yum localinstall http://repo.mysql.com/mysql57-community-release-el7.rpm

rpmkeys --import /etc/pki/rpm-gpg/RPM-GPG-KEY-mysql

yum localinstall http://repo.mysql.com/mysql57-community-release-el7.rpm


rpmkeys --import /etc/pki/rpm-gpg/RPM-GPG-KEY-mysql

# yum --enablerepo=mysql57-community install mysql-community-server-5.7.33
yum --enablerepo=mysql57-community install mysql-community-server

后续步骤1、配置MySQL管理员密码

设置root账户密码

mysql_secure_installation

另一种方法设置SQL管理员密码:

修改/etc/my.conf
末尾添加一行
skip-grant-tables
重启系统（或重启mysqld服务：systemctl restart mysqld
）
登录MySQL管理员root
mysql -u root

设置用户密码和策略

use mysql;

update mysql.user set authentication_string=password('123456') where user='root' AND host = 'localhost';

flush privileges;

特别提醒注意的一点是，5.7 版的 mysql 数据库下的user表中已经没有password字段了,应使用authentication_string