[root@h1 ~]# rpm -ivh http://dev.mysql.com/get/mysql80-community-release-el7-3.noarch.rpm

[root@localhost ~]# yum install -y mysql-server
或
[root@localhost ~]# yum install mysql-community-server

Complete!

[root@localhost ~]# systemctl enable mysqld.service 

[root@localhost ~]# systemctl list-unit-files | grep mysqld

mysqld.service enabled

[root@localhost ~]# systemctl start mysqld.service

[root@localhost ~]# grep 'temporary password' /var/log/mysqld.log

[root@localhost ~]# mysql -uroot -p

#MySQL8.0修改密码需要有大小写字母、数字、特殊字符组合
mysql> ALTER USER 'root'@'localhost' IDENTIFIED BY 'MyNewPass4!';

mysql>flush privileges;

#远程设置
mysql> use mysql;
mysql> update user set host='%' where user='root';
#授权用户名的权限，赋予任何主机访问数据的权限
mysql> GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' WITH GRANT OPTION;
mysql> FLUSH PRIVILEGES;

mysql> ALTER USER 'root'@'%' IDENTIFIED BY 'Root!!2018' PASSWORD EXPIRE NEVER;
Query OK, 0 rows affected (0.03 sec)

mysql> ALTER USER 'root'@'%' IDENTIFIED WITH mysql_native_password BY 'Root!!2018'; 
Query OK, 0 rows affected (0.01 sec)
mysql> FLUSH PRIVILEGES;
Query OK, 0 rows affected (0.00 sec)

#启动mysql
systemctl start mysqld.service
 
#结束
systemctl stop mysqld.service
 
#重启
systemctl restart mysqld.service
 
#开机自启
systemctl enable mysqld.service