在Windows下配置多个git账号

1.生成并部署SSH key

安装好Git客户端后，打开git bash，输入以下命令生成user1的SSH Key：
ssh-keygen -t rsa -C "user1@email.com"

在当前用户的.ssh目录下会生成id_rsa私钥文件和id_rsa.pub公钥文件，将id_rsa.pub中的内容添加至user1的github中。然后在git bash中输入以下命令测试该用户的SSH密钥是否生效：
ssh -T git@github.com

若连接成功则提示Hi user1! You've successfully authenticated, but GitHub does not provide shell access.
注：该命令仅限于文件名为id_rsa的密钥。

接着生成user2的密钥，注意不能再使用默认的文件名id_rsa，否则会覆盖之前密钥文件：

ssh-keygen -t rsa -f ~/.ssh/id_rsa2 -C "user2@email.com"

再将该用户的公钥文件添加至github中。
测试user2的ssh连接时需要指定密钥文件：

ssh -T git@github.com -i ~/.ssh/id_rsa2

也可以使用ssh agent添加密钥后进行测试。因为系统默认只读取id_rsa，为了让ssh识别新的私钥，可以使用ssh-agent手动添加私钥：

ssh-agent bash

ssh-add ~/.ssh/id_rsa2

注：该方法仅限当前窗口有效，打开新的窗口则ssh连接失败。

2.配置config文件

在.ssh目录下创建一个config文本文件，每个账号配置一个Host节点。主要配置项说明：

Host    　　主机别名

HostName　　服务器真实地址

IdentityFile　　私钥文件路径

PreferredAuthentications　　认证方式

User　　用户名

配置文件内容

# 配置user1

Host u1.github.com

HostName github.com
Port 6666

IdentityFile C:\\Users\\Administrator\\.ssh\\id_rsa

PreferredAuthentications publickey

User user1

# 配置user2

Host u2.github.com

HostName github.com

IdentityFile C:\\Users\\Administrator\\.ssh\\id_rsa2

PreferredAuthentications publickey

User user2

再通过终端测试SSH Key是否生效
ssh -T git@u1.github.com
ssh -T git@u2.github.com

3.配置用户名和邮箱

如果之前配置过全局的用户名和邮箱，需要取消相关配置，再在各仓库下配置相应的用户名和邮箱。

git config --global --unset user.name

git config --global --unset user.email

为各仓库单独配置用户名和邮箱

git config user.name "user1"

git config user.email "user1@email.com"

如果原先使用HTTPS通信，则需要修改远程仓库地址

git remote rm origin

git remote add origin git@u1.github.com:xxx/xxxxx.git

4.注意

ssh -T git@github 时，一定要打 yes!yes!yes!!! 我就是被这里坑了！

5.用法：

比如：github 项目地址（ssh）：https://github.com/user1/xxxx.git

正常用法,,要求输入登录密码：
git clone https://github.com/user1/xxxx.git
使用配置文件后,不需要输入密码：
git clone git@github.com:user1/xxxx.git
配置git push不用每次输入用户名和密码:　git remote set-url origin git@xxx.com:xxx/xxx.git

6.参考文章

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