1、编辑mysql-connubity.repo文件，添加官方的yum源

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

添加一下内容：
[mysql57-community]
name=MySQL 5.7 Community Server
baseurl=http://repo.mysql.com/yum/mysql-5.7-community/el/7/$basearch/
enabled1
gpgcheck=0
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-mysql

2、安装mysql

yum install mysql-community-server -y

3、启动mysql数据库

systemctl start mysqld

4、修改mysql数据库密码

grep 'temporary password' /var/log/mysqlg.log
mysqladmin -u roo -p password			# 回车，输入原始密码，在输入新的密码

5、登录mysql

mysql -uroot -p'密码'

6、修改远程链接

gran all privileges on *.* to 'root'@'%' identified bby '密码' with grant option;
flush privileges;