# yum -y install http://dev.mysql.com/get/mysql57-community-release-el7-11.noarch.rpm

# yum -y install mysql-community-server

# systemctl start mysqld

# systemctl enable mysqld

자동 생성된 비밀번호는 /var/log/mysqld.log 에서 확인 가능 

[Note] A temporary password is generated for root@localhost: TSSyLNATu4-M 

mysql> ALTER USER 'root'@'localhost' IDENTIFIED BY 'TSSyLNATu4-M'; 

mysql> FLUSH PRIVILEGES

mysql> use mysql

mysql> SET GLOBAL validate_password_policy=LOW;

mysql> UPDATE user set authentication_string=password('새로운비밀번호') where user='root'; 

[root@ip-172-31-17-24 ~]# service mysqld stop

[root@ip-172-31-17-24 ~]# service mysqld start