1、 用FinalShell 连接腾讯云服务器（如图）
1-1 FinalShell 的详细用法及软件下载
详细内容见见链接
2、详细过程如下
2-1 先添加规则如下图所示
[root@VM-4-8-centos ~]# cd /usr/local/src/[root@VM-4-8-centos src]# wget /mysql57-community-release-el7-8.noarch.rpm[root@VM-4-8-centos src]# rpm -ivh mysql57-community-release-el7-8.noarch.rpm 警告：mysql57-community-release-el7-8.noarch.rpm: 头V3 DSA/SHA1 Signature, 密钥 ID 5072e1f5: NOKEY准备中...################################# [100%]正在升级/安装...[root@VM-4-8-centos src]# yum -y install mysql-server失败的软件包是：mysql-community-client-5.7.39-1.el7.x86_64GPG 密钥配置为：file:///etc/pki/rpm-gpg/RPM-GPG-KEY-mysql[root@VM-4-8-centos src]# rpm --import /RPM-GPG-KEY-mysql-[root@VM-4-8-centos src]# yum -y install mysql-community-server[root@VM-4-8-centos src]# systemctl start mysqld.service[root@VM-4-8-centos src]# grep "password" /var/log/mysqld.log[root@VM-4-8-centos src]# mysql -u root -pEnter password: mysql> alter user 'root'@'localhost' identified by 'Hh123456';Query OK, 0 rows affected (0.00 sec)mysql> create user 'root'@'%' identified by 'Hh123456';Query OK, 0 rows affected (0.00 sec)mysql> grant all privileges on *.* to 'root'@'%' with grant option;Query OK, 0 rows affected (0.00 sec)mysql> flush privileges;Query OK, 0 rows affected (0.00 sec)[root@VM-4-8-centos src]# firewall-cmd --zone=public --add-port=3306/tcp --permanentsuccess[root@VM-4-8-centos src]# firewall-cmd --list-port20/tcp 21/tcp 22/tcp 80/tcp 443/tcp 8888/tcp 39000-40000/tcp[root@VM-4-8-centos src]# firewall-cmd --reloadsuccess[root@VM-4-8-centos src]# firewall-cmd --list-port20/tcp 21/tcp 22/tcp 80/tcp 443/tcp 8888/tcp 39000-40000/tcp 3306/tcp
