每次安装使用mysql都折腾很长时间，这次折腾完毕，把最简单的安装使用记录下来，叫懒人mysql

yum 安装mysql

1.下载mysql的repo源

$ wget http://repo.mysql.com/mysql-community-release-el7-5.noarch.rpm

2. 安装mysql-community-release-el7-5.noarch.rpm包

$ sudo rpm -ivh mysql-community-release-el7-5.noarch.rpm

安装这个包后，会获得两个mysql的yum repo源：

/etc/yum.repos.d/mysql-community.repo
/etc/yum.repos.d/mysql-community-source.repo

3. 安装mysql

$ sudo yum install mysql-server mysql-client libmysqlclient-dev mysql-devel MySQL-python

4.初始化mysql

$ mysql_install_db

简单使用mysql

1.设置root密码

登陆mysql：

$ mysql -u root

设置密码

SET PASSWORD FOR 'root'@'localhost' = PASSWORD('newpass');

2.创建数据库

CREATE DATABASE `testDB` DEFAULT CHARACTER SET utf8

3.创建用户并最大权限：

CREATE USER test@'%' IDENTIFIED BY 'test';
grant all privileges on testDB.* to test@'%' IDENTIFIED BY 'test';