mysql安装与配置（无默认密码）

1.安装

1.wget http://dev.mysql.com/get/mysql-community-release-el7-5.noarch.rpm

2.rpm -ivh mysql-community-release-el7-5.noarch.rpm

3.yum install mysql-community-server

2.安装成功后启动mysql

systemctl start mysqld

3.mysql的初始化配置

// 进入mysql，设置密码，一开始数据库默认没有密码
mysql -u root

4.在mysql中设置密码

set password for 'root'@'localhost' =password('新密码');

5.开启mysql的远程连接，让你可以使用本地的电脑连接云上的mysql

grant all privileges on *.* to root@'%'identified by 'password';

6.退出mysql

exit