1、下载repo源

wget http://repo.mysql.com/mysql57-community-release-el7-8.noarch.rpm 
rpm -ivh mysql57-community-release-el7-8.noarch.rpm
yum -y install mysql-server 

2、相关文件

配置文件：/etc/my.cnf

注：如果要开发远程连接 在配置文件中添加 bind-address = 0.0.0.0

3、启动mysql

service mysqld restart

4、获取默认随机密码

grep "password" /var/log/mysqld.log 
如：
[root@VM_64_69_centos src]# grep "password" /var/log/mysqld.log   
2018-06-22T14:01:17.280254Z 1 [Note] A temporary password is generated for root@localhost: uakpaTVah8(e

5、利用该密码登录

6、修改MySql的密码：

mysql> set password for 用户名@localhost = password('新密码');  
例如：mysql> set password for root@localhost = password('123');  

7、开启远程附加操作

mysql> use mysql
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A

Database changed
mysql> select user,host from user
    -> ;
+---------------+-----------+
| user          | host      |
+---------------+-----------+
| mysql.session | localhost |
| mysql.sys     | localhost |
| root          | localhost |
+---------------+-----------+
3 rows in set (0.00 sec)

mysql> update user set host = '%' where user = 'root' ;
Query OK, 1 row affected (0.00 sec)
Rows matched: 1  Changed: 1  Warnings: 0

mysql> select user,host from user;
+---------------+-----------+
| user          | host      |
+---------------+-----------+
| root          | %         |
| mysql.session | localhost |
| mysql.sys     | localhost |
+---------------+-----------+
3 rows in set (0.00 sec)

mysql> quit
Bye

8、记得重启Mysql

service mysqld restart