配置 ssh key 登录和改 sshd 端口

保存 ssh-key

cat ~/.ssh/id_rsa.pub >> ~/.ssh/authorized_keys
chmod 500 .ssh/authorized_keys

禁用密码登录与改端口

sudo vim /etc/ssh/sshd_config

Port 22

# 启用密钥验证
RSAAuthentication yes # below 16.0
PubkeyAuthentication yes


# 指定公钥数据库文件
AuthorizedKeysFile %h/.ssh/authorized_keys # below 16.0
AuthorizedKeysFile .ssh/authorized_keys # 18.0

PasswordAuthentication no

sudo service sshd restart

or

sudo service ssh restart