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通过 ssh 连接时使用特定的 SSH 密钥对，并暂时忽略所有其他密钥？

tag-icon • tag-icon ssh key-authentication
通过 ssh 连接时使用特定的 SSH 密钥对，并暂时忽略所有其他密钥？

如何ssh暂时忽略 中存在的任何 SSH 密钥$HOME/.ssh对以及可能加载的密钥ssh-agent？

笔记：我不想$HOME/.ssh通过将 SSH 密钥对文件移出目录来对目录进行任何更改，也不想编辑我的$HOME/.ssh/config文件，也不想从我的密钥环中删除密钥（即ssh-agent）。

答案1

我一般是这样做的：

$ ssh -o IdentitiesOnly=yes -F /dev/null -i ~/path/to/some_id_rsa [email protected]

选项如下：

  • -o IdentitiesOnly=yes- 告诉 SSH 仅使用通过 CLI 提供的密钥，而不使用来自$HOME/.sshssh-agent 或通过 ssh-agent提供的密钥
  • -F /dev/null- 禁止使用$HOME/.ssh/config
  • -i ~/path/to/some_id_rsa- 您明确想要用于连接的密钥

例子

$ ssh -v -o IdentitiesOnly=yes -F /dev/null -i ~/my_id_rsa [email protected]
OpenSSH_6.2p2, OSSLShim 0.9.8r 8 Dec 2011
debug1: Reading configuration data /dev/null
debug1: Connecting to someserver.mydom.com [10.128.12.124] port 22.
debug1: Connection established.
debug1: identity file /Users/sammingolelli/my_id_rsa type 1
debug1: identity file /Users/sammingolelli/my_id_rsa-cert type -1
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_6.2
debug1: Remote protocol version 2.0, remote software version OpenSSH_5.3
debug1: match: OpenSSH_5.3 pat OpenSSH_5*
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: server->client aes128-ctr hmac-md5 none
debug1: kex: client->server aes128-ctr hmac-md5 none
debug1: SSH2_MSG_KEX_DH_GEX_REQUEST(1024<1024<8192) sent
debug1: expecting SSH2_MSG_KEX_DH_GEX_GROUP
debug1: SSH2_MSG_KEX_DH_GEX_INIT sent
debug1: expecting SSH2_MSG_KEX_DH_GEX_REPLY
debug1: Server host key: RSA f5:60:30:71:8c:a3:da:a3:fe:b1:6d:0b:20:87:23:e1
debug1: Host 'qa03-ost-tesla-h-app01' is known and matches the RSA host key.
debug1: Found key in /Users/sammingolelli/.ssh/known_hosts:103
debug1: ssh_rsa_verify: signature correct
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug1: SSH2_MSG_NEWKEYS received
debug1: Roaming not allowed by server
debug1: SSH2_MSG_SERVICE_REQUEST sent
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug1: Authentications that can continue: publickey,gssapi-keyex,gssapi-with-mic,password
debug1: Next authentication method: publickey
debug1: Offering RSA public key: /Users/sammingolelli/my_id_rsa
debug1: Server accepts key: pkalg ssh-rsa blen 535
debug1: read PEM private key done: type RSA
debug1: Authentication succeeded (publickey).
Authenticated to someserver.mydom.com ([10.128.12.124]:22).
debug1: channel 0: new [client-session]
debug1: Requesting [email protected]
debug1: Entering interactive session.
Last login: Tue Dec  8 19:03:24 2015 from 153.65.219.15
someserver$

请注意，在上面的输出中，ssh仅通过 CLI 识别了my_id_rsa私钥，并使用它连接到某个服务器。

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