[root@localhost ~]# wget https://dev.mysql.com/get/mysql57-community-release-el7-11.noarch.rpm

yum -y install wget

wgethttps://dev.mysql.com/get/mysql57-community-release-el7-11.noarch.rpm

yum -y localinstall mysql57-community-release-el7-11.noarch.rpm

yum -y install mysql-community-server

systemctl start mysqld

[root@localhost ~]# systemctl enable mysqld
[root@localhost ~]# systemctl daemon-reload

[root@localhost ~]# vi /var/log/mysqld.log

[root@localhost ~]# mysql -u root -p
Enter password:

mysql> ALTER USER 'root'@'localhost' IDENTIFIED BY 'Caofeng2012@';
Query OK, 0 rows affected (0.00 sec)

mysql> GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY 'Caofeng2012@' WITH GRANT OPTION;
Query OK, 0 rows affected, 1 warning (0.01 sec)
mysql> exit;
Bye

[root@localhost ~]# firewall-cmd --zone=public --add-port=3306/tcp --permanent
success
[root@localhost ~]# firewall-cmd --reload
success
[root@localhost ~]#

[mysqld]
character_set_server=utf8
init_connect='SET NAMES utf8'

[root@localhost ~]# vi /etc/my.cnf

[root@localhost ~]# systemctl restart mysqld
[root@localhost ~]#

mysql> show variables like '%character%';

+--------------------------+----------------------------+

| Variable_name | Value |

+--------------------------+----------------------------+

| character_set_client | utf8 |
| character_set_connection | utf8 |
| character_set_database | utf8 |
| character_set_filesystem | binary |
| character_set_results | utf8 |
| character_set_server | utf8 |
| character_set_system | utf8 |
| character_sets_dir | /usr/share/mysql/charsets/ |

+--------------------------+----------------------------+

8 rows in set (0.00 sec)