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参考链接：http://higrid.net/c-art-github_share_ssh.htm
http://yijiebuyi.com/blog/f18d38eb7cfee860c117d629fdb16faf.html
1、使用命令新建个ssh-key
tingdeMacBook-Pro:ContinuousIntegration ting$ ssh-keygen -t rsa -C ‘xxxx@163.com‘
2、注意命令运行时输入新的文件名：
tingdeMacBook-Pro:ContinuousIntegration ting$ ssh-keygen -t rsa -C ‘xxxx@163.com‘ Generating public/private rsa key pair. Enter file in which to save the key (/Users/ting/.ssh/id_rsa): /Users/ting/.ssh/id_rsa_xxxx163_github Enter passphrase (empty for no passphrase): Enter same passphrase again: Your identification has been saved in /Users/ting/.ssh/id_rsa_xxxx163_github. Your public key has been saved in /Users/ting/.ssh/id_rsa_xxxx163_github.pub. The key fingerprint is:……
3、默认SSH只会读取id_rsa，所以为了让SSH识别新的私钥，需要将其添加到SSH agent
ssh-add ~/.ssh/id_rsa_xxxx163_github
Identity added: /Users/ting/.ssh/id_rsa_xxxx163_github (/Users/ting/.ssh/id_rsa_xxxx163_github)
4、完成以上步骤后在~/.ssh目录创建config文件，该文件用于配置私钥对应的服务器。内容如下：
# Default github user(first@mail.com) Host github.com HostName github.com User git IdentityFile C:/Users/username/.ssh/id_rsa # second user(second@mail.com) Host github-second HostName github.com User git IdentityFile C:/Users/username/.ssh/id_rsa_second
5、Host随意即可，方便自己记忆，后续在添加remote是还需要用到。 配置完成后，在连接非默认帐号的github仓库时，远程库的地址要对应地做一些修改，比如现在添加second帐号下的一个仓库test，则需要这样添加：
git remote add test git@github-second:second/test.git #并非原来的git@github.com:second/test.git
注意： github根据配置文件的user.email来获取github帐号显示author信息，所以对于多帐号用户一定要记得将user.email改为相应的email(second@mail.com)。
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原文地址：http://www.cnblogs.com/LemonTing/p/4779183.html
