SSH 连接问题 SSh Agent admitted failure to sign using the key

最新推荐文章于 2025-08-08 11:40:36 发布

johnnywsd

最新推荐文章于 2025-08-08 11:40:36 发布

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本文详细介绍了如何在Linux环境下，通过SSH密钥对的方式，实现在一台服务器（192.168.1.110）无需密码即可登录另一台服务器（192.168.1.112）。具体步骤包括创建密钥对、将公钥复制到目标服务器、添加公钥到信任区域，并确保SSH-agent的正确配置。

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现有2台机器

1、服务器192.168.1.112

2、个人机192.168.1.110

要使110无需密码通过ssh登入112

步骤

1、创建密钥

miao@u32-192-168-1-110:~/.ssh$ ssh-keygen -t rsa

Generating public/private rsa key pair.
Enter passphrase (empty for no passphrase): (忽略)
Enter same passphrase again: (忽略)
Your identification has been saved in /home/miao/.ssh/id_rsa.
Your public key has been saved in /home/miao/.ssh/id_rsa.pub.

2、复制公密到服务器

miao@u32-192-168-1-110:~/.ssh$ scp id_rsa.pub miao@192.168.1.112:/home/miao/.ssh/192.168.1.110
miao@192.168.1.112's password: 
id_rsa.pub                                                                   100%  404     0.4KB/s   00:00    
miao@u32-192-168-1-110:~/.ssh$

3、添加公密到192.168.112的信任区域

miao@debian-192-168-1-112:~/.ssh$ cat 192.168.1.110 >> authorized_keys
miao@debian-192-168-1-112:~/.ssh$

注： 2，3两步可由命令ssh-copy-id一步到位

miao@ubuntu-192-168-1-110:~/.ssh$ ssh-copy-id miao@192.168.1.112
Password:
Now try logging into the machine, with "ssh 'miao@192.168.1.112'", and check in:

  .ssh/authorized_keys

to make sure we haven't added extra keys that you weren't expecting.

4、启动ssh-agent

如果ssh 192.168.112返回 Agent admitted failure to sign using the key
ps -Af|grep agent查看有无ssh-agent有无运行，

miao@u32-192-168-1-110:~/.ssh$ ps -Af|grep agent

5、若没有添加id_rsa到ssh-agent

miao@u32-192-168-1-110:~/.ssh$ ssh-agent