Linux SSH登陆错误解决办法

SSH登陆错误解决办法:

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@    WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED!     @
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IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY!
Someone could be eavesdropping on you right now (man-in-the-middle attack)!
It is also possible that the RSA host key has just been changed.
The fingerprint for the RSA key sent by the remote host is
21:24:59:ba:53:d7:51:a2:12:13:40:09:53:03:5b:e6.
Please contact your system administrator.
Add correct host key in /home/cmccpay/.ssh/known_hosts to get rid of this message.
Offending key in /home/cmccpay/.ssh/known_hosts:11
RSA host key for 10.202.76.27 has changed and you have requested strict checking.
Host key verification failed.

出现该错误的解决方法:

1.因为在本地机器上曾经用SSH登录过这台远程计算机,因而留下了known_hosts的记录,在远程计算机重新安装系统后不能够通过鉴权。删除~/.ssh/known_hosts中对应的项目,问题获得解决。(很麻烦。。忽视之)

2.在客户端执行下述指令即可:$mv~/.ssh/known_hosts/tmp(相对好一点,用过)

再次登录后会出现最初需要增加条目:

Theauthenticityofhost'128.112.139.3(128.112.139.3)'can'tbeestablished.

RSAkeyfingerprintisce:78:c2:d5:26:11:42:cf:c6:e6:65:99:9c:60:51:34.

Areyousureyouwanttocontinueconnecting(yes/no)?Theauthenticityofhost'132.170.3.32(132.170.3.32)'can'tbeestablished.

RSAkeyfingerprintis91:14:9c:ea:e7:43:5d:8b:57:aa:51:57:e0:28:06:52.

Areyousureyouwanttocontinueconnecting(yes/no)?yes

3.配置文件进行配置,使出现“Warning:Hostidentificationhaschanged!”时候可以自动更新~/.ssh/known_hosts中的相应条目,而不出现提示。(比较好!方便,无需后期处理)

OpenSSH有三种配置方式:命令行参数、用户配置文件和系统级的配置文件("/etc/ssh/ssh_config")。命令行参数优先于配置文件,用户配置文件优先于系统配置文件。所有的命令行的参数都能在配置文件中设置。因为在安装的时候没有默认的用户配置文件,所以要把"/etc/ssh/ssh_config"拷贝并重新命名为"~/.ssh/config"。

(下一篇中具体介绍ssh的配置文件)

注意在配置文件~/.ssh/config中修改下面的内容:

   
Host *
            GSSAPIAuthentication yes
            BatchMode yes
            StrictHostKeyChecking no

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