- 安装openssh服务
sudo apt update
sudo apt install openssh-server
- 检查服务是否启动
sudo systemctl status ssh
sudo systemctl start ssh
- 放开22端口
sudo ufw allow 22/tcp
- ssh连接
ssh user_name@remote_host
- 关闭防火器
sudo ufw disable
- 关闭ssh服务
sudo ufw deny 22/tcp
sudo systemctl stop --now ssh
sudo systemctl disable --now ssh
- 修改ssh默认端口
sudo nano /etc/ssh/sshd_config
#Port 22
Port 2232
sudo systemctl restart ssh
