rpm -ivh MysqL80-community-release-el7-3.noarch.rpm　

yum clean all
yum makecache
 
查看MysqL yum仓库中MysqL版本，使用如下命令
yum repolist all | grep MysqL

yum install MysqL-community-server

use MysqL;
select user,host from user;
update user set host=‘%‘ where user=‘root‘;
ALTER USER ‘root‘@‘%‘ IDENTIFIED WITH MysqL_native_password BY ‘abcd!123abcd;