目前手上不止一个git账号，平台也不一致，这就比较尴尬了：
- 同一个
SSH Key中不允许两个账号
- 再次生成新的
SSH Key会将上次的覆盖
目前的解决办法是，生成多个SSH Key并命别名，通过配置文件指定域
用ssh-keygen生成多个key
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$ ssh-keygen -t rsa -C "wuwz@live.com"
Generating public/private rsa key pair.
Enter file in which to save the key (/Users/wuwenze/.ssh/id_rsa): /Users/wuwenze/.ssh/github
Enter passphrase (empty for no passphrase):
Enter same passphrase again:
Your identification has been saved in /home/ubuntu/.ssh/id_rsa_github.
Your public key has been saved in /home/ubuntu/.ssh/id_rsa_github.pub.
The key fingerprint is:
SHA256:T4s5hxOOX3ABGNHZNMPX6v7J1rgYxfzXMCuCipIh5Ng wuwz@live.com
The key's randomart image is:
+---[RSA 2048]----+
| o=.=+ . |
| . o.oo. . |
| .. . |
| . ..o |
|+. S o. * |
|o.E o @ ... =.|
| . o . O *.o .o+|
| o . o = ..=o.o|
| .. . . .o=. |
+----[SHA256]-----+
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根据提示，重新指定文件名，假设我有三个平台需要同时管理，即
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/Users/wuwenze/.ssh/github
/Users/wuwenze/.ssh/gitee
/Users/wuwenze/.ssh/coding
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依次按照上述操作，添加3个ssh-key，生成后的文件位于~/.ssh
添加私钥
git自动把新生成的私钥写到known_hosts中
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$ ssh-add ~/.ssh/github
$ ssh-add ~/.ssh/gitee
$ ssh-add ~/.ssh/coding
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如果执行ssh-add时提示"Could not open a connection to your authentication agent"，可以执行命令：
然后再运行ssh-add命令，添加完成后，通过以下命令来验证：
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### 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，清空后重复上一步操作
$ ssh-add -D
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配置文件
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$ vi ~/.ssh/config
### coding
Host coding.net
HostName coding.net
PreferredAuthentications publickey
IdentityFile ~/.ssh/id_rsa_coding
### github
Host github.com
HostName github.com
PreferredAuthentications publickey
IdentityFile ~/.ssh/id_rsa_github
### github
Host gitee.com
HostName gitee.com
PreferredAuthentications publickey
IdentityFile ~/.ssh/id_rsa_gitee
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配置公钥并验证
依次登录对应的平台，配置SSH公钥，如：github
依次验证：
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$ ssh -T git@github.com
$ ssh -T git@gitee.com
$ ssh -T git@git.coding.net
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