rpm -Uvh  http://dev.mysql.com/get/mysql57-community-release-el7-9.noarch.rpm

yum -y install mysql-community-server --nogpgcheck

mysql -V

systemctl start mysqld

systemctl enable mysqld

grep 'temporary password' /var/log/mysqld.log

mysql -uroot -p

set global validate_password_policy=0;  #修改密码安全策略为低（只校验密码长度，至少8位）。
ALTER USER 'root'@'localhost' IDENTIFIED BY '12345678';

GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY '12345678';

exit

mysql -uroot -p12345678

create database test;

show databases;

use mysql;

show tables; 

exit

mysqldump -uroot -p test >test.sql

ll

mysql -uroot -p -Dtest<test.sql

mysql -uroot -p12345678

use test;

source /root/test.sql;