如何在一台设备上使用多个GitHub账户

为不同GitHub账户创建不同的SSH密钥

首先确保当前目录为.ssh

1	`$ cd ~/.ssh`

生成不同GitHub账户对应的ssh密钥

$ ssh-keygen -t ed25519 -C "your_email@example.com" -f "github-username"

# If you are using a legacy system that doesn't support the Ed25519 algorithm, use:
$ ssh-keygen -t rsa -b 4096 -C "your_email@example.com" -f "github-username"

-C stands for comment to help identify your ssh key -f stands for the file name where your ssh key get saved

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> Enter passphrase (empty for no passphrase): [Type a passphrase]
>
> Enter same passphrase again: [Type passphrase again]

添加密钥到ssh-agent

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$ ssh-add [--apple-use-keychain] ~/.ssh/github-username
# The --apple-use-keychain option is in Apple's standard version of ssh-add. In MacOS versions prior to Monterey (12.0), the --apple-use-keychain and --apple-load-keychain flags used the syntax -K and -A, respectively.

添加公钥至GitHub

将公钥内容复制到剪切板
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$ pbcopy < ~/.ssh/github-username.pub
粘贴到GitHub
- Settings > SSH and GPG keys > New SSH Key
- 填写title并粘贴公钥

配置ssh config

打开~/.ssh/config

# Default github account: github-username
Host github.com
   HostName github.com
   IdentityFile ~/.ssh/github-username
   IdentitiesOnly yes
   
# Other github account: another-github-username
Host github-another-github-username
   HostName github.com
   IdentityFile ~/.ssh/another-github-username
   IdentitiesOnly yes

测试连接

1 2	`$ ssh -T git@github.com $ ssh -T git@github.com-another-github-username`

正常情况将会看到👇

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> Hi github-username! You've successfully authenticated, but GitHub does not provide shell access.
> Hi another-github-username! You've successfully authenticated, but GitHub does not provide shell access.

如何使用

1 2	`$ git clone git@github.com-{your-username}:{owner-user-name}/{the-repo-name}.git # [e.g.] git clone git@github.com-github-username:github-username/TestRepo.git`

为了确保使用正确的账号进行commits和push，需要在每个仓库配置user.email和user.name