工作中遇到的问题及解决方案

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1.ssh登录　The authenticity of host 192.168.0.xxx can't be established.　的问题

用ssh登录一个机器（换过ip地址），提示输入yes后，屏幕不断出现y，只有按ctrl + c结束

错误是：The authenticity of host 192.168.0.xxx can't be established.

以前和同事碰到过这个问题，解决了，没有记录，这次又碰到了不知道怎么处理，还好有QQ聊天记录，查找到一下，找到解决方案：

执行ssh  -o StrictHostKeyChecking=no  192.168.0.xxx　就OK

网址是：

http://blog.ossxp.com/2010/04/1026/

记一下，防止又忘记了，又快到3点了，无数个不眠之夜啊。

2011/10/11

某天机器又改IP了，ssh后，报：

mmt@FS01:~$ ssh  -o StrictHostKeyChecking=no  192.168.0.130

@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@

@    WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED!    @

@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@

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

fe:d6:f8:59:03:a5:de:e8:29:ef:3b:26:6e:3d:1d:4b.

Please contact your system administrator.

Add correct host key in /home/mmt/.ssh/known_hosts to get rid of this message.

Offending key in /home/mmt/.ssh/known_hosts:38

Password authentication is disabled to avoid man-in-the-middle attacks.

Keyboard-interactive authentication is disabled to avoid man-in-the-middle attacks.

Permission denied (publickey,password).

注意这句

Add correct host key in /home/mmt/.ssh/known_hosts to get rid of this message.

执行：

mv  /home/mmt/.ssh/known_hosts known_hosts.bak

再连：

ssh  -o StrictHostKeyChecking=no  192.168.0.130

OK了!

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2.xcrun: error: active developer path ("/Applications/Xcode.app/Contents/Developer/") does not exist, use `xcode-select --switch path/to/Xcode.app` to specify the Xcode that you wish to use for command line developer tools (or see `man xcode-select`)

这个的原因，是因为更新了xcode软件，在更新svn时，找不到这个软件，导致的。

解决办法就是：将Xcode的路径，重新设置一下。

sudo xcode-select --switch “Xcode的path，直接在应用程序里面找到Xcode，拖拽到这里”

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