| 查看防火墙状态 | systemctl status firewalld / firewall-cmd --state | |
| 暂时关闭防火墙 | systemctl stop firewalld | |
| 永久关闭防火墙(禁用开机自启) | systemctl disable firewalld | |
| 暂时开启防火墙 | systemctl start firewalld | |
| 永久开启防火墙(启用开机自启) | systemctl enable firewalld | |
| 开放指定端口 | firewall-cmd --zone=public --add-port=8080/tcp --permanent | |
| 关闭指定端口 | firewall-cmd --zone=public --remove-port=8080/tcp --permanent | |
| 立即生效(重新加载) | firewall-cmd --reload | |
| 查看开放端口 | firewall-cmd --zone=public --list-ports |
mysql命令
systemctl status mysqld 查看mysql服务状态
systemctl start mysqld 启动mysql服务
systemctl stop mysqld 停止mysql服务
设置开机自启动mysql服务
systemctl enable mysqld
登录mysql（复制日志中的临时密码登录）
mysql -uroot -p
修改密码
set global validate_password_length=4; 设置密码长度最低位数
set global validate_password_policy=LOW; 设置密码安全等级低，便于密码可以修改成root
set password = password('root'); 设置密码为root
开启访问权限
grant all on *.* to 'root'@'%' identified by 'root';
flush privileges;
