1. 官网下载rpm
2. Adding the MySQL Yum Repository

shell> sudo rpm -Uvh mysql57-community-release-el6-n.noarch.rpm

1. Selecting a Release Series
   编辑/etc/yum.repos.d/mysql-community.repo文件，默认安装5.7

[mysql57-community]
name=MySQL 5.7 Community Server
baseurl=http://repo.mysql.com/yum/mysql-5.7-community/el/6/$basearch/
enabled=1
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-mysql

1. 安装吧小宝贝儿~~可以启动啦

shell> sudo yum install mysql-community-server   # 安装
shell> sudo service mysqld start                 # 启动服务

1. 修改密码，默认初始化了一个密码写在log中了

shell> sudo grep 'temporary password' /var/log/mysqld.log
shell> mysql -u root -p 
# 输入第一行找到的密码

1. 修改密码策略，要不然尝试很多次都提示密码不够安全（生产环境不推荐）

mysql> set global validate_password_policy=0;
mysql> set global validate_password_length=4;
mysql> set password=password('123456');
mysql> flush privileges;
mysql> quit;

1. 增加外网访问策略 （生产环境不推荐）

mysql> set global validate_password_policy=0;
mysql> set global validate_password_length=4;
mysql> grant all PRIVILEGES on *.* to root@'172.16.70.127'  identified by '123456';
mysql> flush privileges;
mysql> quit;