linux服务器使用私钥文件进行 SSH 登陆

linux 使用ssh key进行登陆

1.创建key

ssh-keygen -t rsa #回车
#    Enter file in which to save the key (/root/.ssh/id_rsa): #默认即可
#    Enter passphrase (empty for no passphrase): #输入密码
#    Enter same passphrase again: #再输入一遍保护密码
#    Your identification has been saved in /root/.ssh/id_rsa.
#    Your public key has been saved in /root/.ssh/id_rsa.pub.
#    The key fingerprint is:
#    SHA256:BQLRxhkpfq6H4LdXrAInx/nFS7OFqb+MmyoCBABkVUI root@Fuyoo
#    The key's randomart image is:
#    +---[RSA 2048]----+
#    |*ooE+*o+.        |
#    |o   o *. .       |
#    |.  . o    .      |
#    | .  . .  .       |
#    |.  . + oSo       |
#    |. + = . X .      |
#    |.. * + * =       |
#    |. o = *+o        |
#    | . oo*+o+.       |
#    +----[SHA256]-----+

2.将公钥导入到vps

cat /root/.ssh/id_rsa.pub >> /root/.ssh/authorized_keys

3.修改SSHD的配置文件/etc/ssh/sshd_config

#RSAAuthentication yes #去掉注释
#PubkeyAuthentication yes #去掉注释
#AuthorizedKeysFile .ssh/authorized_keys #去掉注释

4.重启服SSH务 后 进行测试

service sshd restart

5.测试完成后关闭root用户密码登陆

PasswordAuthentication yes #修改为 PasswordAuthentication no

6.保存重启

service sshd restart
  1. 后续
    备份私钥后删除服务器端的私钥

引用博客:http://blog.iefer.com/

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