阿里云CentOS6.8下使用yum安装mysql，并远程登陆mysql

yum list installed | grep MySQL

remove方式:
yum -y remove XXX(上述检查出的已安装的组件名称)

yum -y install mysql mysql-server mysql-devel

yum list installed | grep MySQL

service mysqld start
mysql -u root

mysql > use mysql;
mysql > update user set password=password('123456') where user='root';

**除此之外，还有很多修改方式**

GRANT ALL PRIVILEGES ON *.*  TO 'root'@'%' IDENTIFIED BY '123456' WITH GRANT OPTION;
FLUSH PRIVILEGES;

添加安全组规则（端口3306）

chkconfig mysqld on