# lsb_release -a
LSB Version: :base-4.0-amd64:base-4.0-noarch:core-4.0-amd64:core-4.0-noarch
Distributor ID: CentOS
Description: CentOS release 6.8 (Final)
Release: 6.8
Codename: Final
Centos 6.8 公钥登录
第一步：开启公钥登录
修改文件
# vim /etc/ssh/sshd_config
开启公钥登录
#开启秘钥登录
RSAAuthentication yes
PubkeyAuthentication yes
AuthorizedKeysFile .ssh/authorized_keys
重启sshd
service sshd restart
第二步：增加本地公钥文件
修改文件
vim ~/.ssh/authorized_keys
增加自己本地的公钥文件内容
# cat ~/.ssh/id_rsa.pub
ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDDU3UxwVJVTqY80s9HhGrBue3PIbsvWuIkXxIokPLN8C6mSUW/PeJQ73jjp1ZXEEygePXkxAou7JsPBItHQ5C7U1Zg6rAt3x7JTccNjvoVIRRbpxLY4AK/qlr1nEHtLxGEfCTtZ4pVrtEyLXQDGYIS6lexvA96z9Z19YfZLRRkzbPp6Jud8kBG+j3hLAlfXMkB/+HJ6HFOQ7Sa5DUoZn98on0LvZPdThxwxBpLcNqjIZ3tiTUobnY1EKbi/8kcq9tS8vLoPFdsEQM4F3pe9P6cXQGaHy73z06/tWGfsVlGomJFSOrvNvtPXd/SsRRLrUMlE8yM7zQaoZULNG7KEVyb jiqing@JQ-Mac
第三步：尝试公钥登录
尝试公钥登录
$ ssh root@xxx
Last login: Wed Dec 4 11:28:52 2019 from 218.93.209.11
Welcome to Alibaba Cloud Elastic Compute Service !
第四步：禁止密码登录
修改文件
# vim /etc/ssh/sshd_config
去掉密码登录
PasswordAuthentication no # 禁止密码登录
重启sshd
service sshd restart