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Git生成多个ssh key

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当使用了多个不同的git版本控制系统，分别有不同账号时，如一个在github上面有项目，一个在coding或者开源中国上面的有项目时，如果2者的邮箱不同时，就会涉及一个问题，生成的ssh key 会相互覆盖，必然有一个无法使用；

下面记录下解决方法：

生成ssh-key

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//创建github的ssh key
ssh-keygen -t rsa -C "your_email@example.com" -f /c/user/username/.ssh/github_rsa
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example：
//我的秘钥保存路径C:\Users\MMA\.ssh\test,邮箱使用your_email@example.com
ssh-keygen -t rsa -C "your_email@example.com" -f /c/Users/MMA/.ssh/test/github_rsa 
//运行之后弹出
$ ssh-keygen -t rsa -C "your_email@example.com" -f /c/User/MMA/.ssh/test/test/github_rsa
Generating public/private rsa key pair.
Enter passphrase (empty for no passphrase):

回车默认即可，出现下面提示，则创建成功

Your identification has been saved in /c/Users/MMA/.ssh/test/github_rsa.
Your public key has been saved in /c/Users/MMA/.ssh/test/github_rsa.pub.
The key fingerprint is:
SHA256:AjEAqCT5VeTZsdHpklyMIVQQWbBVtAufE/P/GzkEw9I your_email@example.com
The key's randomart image is:
+---[RSA 2048]----+
|oo..o+OBBBo.     |
|+.  .+.*.+=.o    |
|+. .. +.+++. E   |
|. .  .  +o.*. o  |
|      . S.= .  . |
|       .   . .. .|
|              .+ |
|               .o|
|               .o|
+----[SHA256]-----+


查看本地目录，GitHub ssh key生成成功
github

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//创建coding的ssh key
ssh-keygen -t rsa -C "my_email@example.com" -f /c/Users/MMA/.ssh/test/coding_rsa

和创建github的相似
$ ssh-keygen -t rsa -C "my_email@example.com" -f /c/Users/MMA/.ssh/test/coding_rsa
Generating public/private rsa key pair.
Enter passphrase (empty for no passphrase):
Enter same passphrase again:
Your identification has been saved in /c/Users/MMA/.ssh/test/coding_rsa.
Your public key has been saved in /c/Users/MMA/.ssh/test/coding_rsa.pub.
The key fingerprint is:
SHA256:aqcMT/i9ZgXB6aCHus1zdf5JQlrLBYfUnnIBNJ37WIQ my_email@example.com
The key's randomart image is:
+---[RSA 2048]----+
|       . o=+ o   |
|      . +. oE .  |
|     o o .o..=   |
|    o . o .o= .  |
|   . .  S.oo.+   |
|  .  . ..=oo. .  |
|   +o +.o++ .    |
|  . +B.+o .o .   |
|     o=oo. .o    |
+----[SHA256]-----+

github+coding

添加私钥到SSH agent中

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ssh-add /c/Users/MMA/.ssh/test/coding_rsa
ssh-add/c/Users/MMA/.ssh/test/github_rsa

如果执行ssh-add时提示"Could not open a connection to your authentication agent"，可以现执行命令：ssh-agent bash

重新添加即可

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MMA@MMA-PC MINGW64 ~/Desktop
$ ssh-add /c/Users/MMA/.ssh/test/github_rsa
Identity added: /c/Users/MMA/.ssh/test/github_rsa (/c/Users/MMA/.ssh/test/github_rsa)

MMA@MMA-PC MINGW64 ~/Desktop
$ ssh-add /c/Users/MMA/.ssh/test/coding_rsa
Identity added: /c/Users/MMA/.ssh/test/coding_rsa (/c/Users/MMA/.ssh/test/coding_rsa)

MMA@MMA-PC MINGW64 ~/Desktop
$ ssh-add -l
2048 SHA256:aqcMT/i9ZgXB6aCHus1zdf5JQlrLBYfUnnIBNJ37WIQ /c/Users/MMA/.ssh/test/coding_rsa (RSA)
2048 SHA256:AjEAqCT5VeTZsdHpklyMIVQQWbBVtAufE/P/GzkEw9I /c/Users/MMA/.ssh/test/github_rsa (RSA)

// 可以通过 ssh-add -l 来确私钥列表

ssh-add -l

// 可以通过 ssh-add -D 来清空私钥列表

ssh-add -D

修改config文件

在/c/Users/MMA/.ssh/test 目录下新建一个config文件

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# coding
	Host git.coding.net
	PreferredAuthentications publickey
	IdentityFile /c/Users/MMA/.ssh/test/coding_rsa
# github
	Host github.com
	PreferredAuthentications publickey
	IdentityFile /c/Users/MMA/.ssh/test/github_rsa

添加公钥到git平台

[coding教程]https://coding.net/help/doc/git/ssh-key.html)

[github教程]https://help.github.com/articles/adding-a-new-ssh-key-to-your-github-account)