安装openssh-server
sudo apt install openssh-server
编辑/etc/ssh/sshd_config文件
Port 2222
PermitRootLogin yes
创建/run/sshd目录
sudo mkdir /run/sshd
创建ssh密钥
ssh-keygen
写入公钥到authorized_keys
cat id_rsa.pub >>authorized_keys
修改authorized_keys权限
sudo chmod 600 authorized_keys
启动sshd
sudo /usr/sbin/sshd