1、下载到自己指定的目录并安装
wget http://repo.mysql.com/mysql-community-release-el7-5.noarch.rpm
rpm -ivh mysql-community-release-el7-5.noarch.rpm
yum update
yum install mysql-server
2、设置权限 
chown mysql:mysql -R /var/lib/mysql
3、初始化mysql

mysqld --initialize
4、启动mysql 

systemctl start mysqld
5、设置mysql 密码

 mysqladmin -u root password "your_password";

6、验证密码 进入mysql 
mysql -u root -p 输入刚设置的密码，成功进入mysql。

7、开启允许局域网内连接
GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY 'youpassword' WITH GRANT OPTION;
//刷新权限
FLUSH PRIVILEGES;