摘要：1.查看防火墙状态 systemctl status firewalld 2.开启防火墙 systemctl start firewalld 3.关闭防火墙 systemctl stop firewalld 4.防火墙开启5432端口 firewall-cmd --permanent --zone= 阅读全文

摘要：1.进入root用户 ```sudo su -``` 2.安装openssh-server ```sudo apt install openssh-server``` 3.开通22端口(如果未安装ufw，请先装ufw) ```sudo ufw allow 22``` 阅读全文