Linux 本机配置免密登录

未配置前

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输入 ssh localhost 提示要输入密码。

配置过程

• 生成密钥，生成过程中需要输入的地方，直接 enter

ssh-keygen -t rsa

[root@root .ssh]# ssh-keygen -t rsa
Generating public/private rsa key pair.
Enter file in which to save the key (/root/.ssh/id_rsa): 
Enter passphrase (empty for no passphrase): 
Enter same passphrase again: 
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:KCNz8XfS7n7YnPcodVQkcRLrNsHOeLnErRxy4DasP28 root@vpa-aiui.novalocal
The key's randomart image is:
+---[RSA 2048]----+
|              =+o|
|             . =.|
|    .       . + .|
|     o . . o B +.|
|  o + o S o B &..|
|   + o . + o O.=.|
|          o+ o+. |
|         ...B E. |
|         .o..*o..|
+----[SHA256]-----+

执行完后，/root/.ssh/目录下会生成两文件

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• 公钥导入授权文件

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

• 再次尝试登录，成功。

  
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