这个答案是给初学者的(非git大师)。我最近遇到了这个问题，也许这只是我的问题，但大多数答案似乎需要对git有相当深入的了解。在阅读了包括这个线程在内的几个堆栈溢出的答案后，下面是我需要采取的步骤，以便在GitHub帐户之间轻松切换(例如，假设有两个GitHub帐户，github.com/personal和gitHub.com/work):

Check for existing ssh keys: Open Terminal and run this command to see/list existing ssh keys ls -al ~/.ssh files with extension .pub are your ssh keys so you should have two for the personal and work accounts. If there is only one or none, its time to generate other wise skip this.- Generating ssh key: login to github (either the personal or work acc.), navigate to Settings and copy the associated email.now go back to Terminal and run ssh-keygen -t rsa -C "the copied email", you'll see:Generating public/private rsa key pair. Enter file in which to save the key (/.../.ssh/id_rsa): id_rsa is the default name for the soon to be generated ssh key so copy the path and rename the default, e.g. /.../.ssh/id_rsa_work if generating for work account. provide a password or just enter to ignore and, you'll read something like The key's randomart image is: and the image. done.Repeat this step once more for your second github account. Make sure you use the right email address and a different ssh key name (e.g. id_rsa_personal) to avoid overwriting. At this stage, you should see two ssh keys when running ls -al ~/.ssh again. Associate ssh key with gitHub account: Next step is to copy one of the ssh keys, run this but replacing your own ssh key name: pbcopy < ~/.ssh/id_rsa_work.pub, replace id_rsa_work.pub with what you called yours.Now that our ssh key is copied to clipboard, go back to github account [Make sure you're logged in to work account if the ssh key you copied is id_rsa_work] and navigate toSettings - SSH and GPG Keys and click on New SSH key button (not New GPG key btw :D) give some title for this key, paste the key and click on Add SSH key. You've now either successfully added the ssh key or noticed it has been there all along which is fine (or you got an error because you selected New GPG key instead of New SSH key :D). Associate ssh key with gitHub account: Repeat the above step for your second account. Edit the global git configuration: Last step is to make sure the global configuration file is aware of all github accounts (so to say). Run git config --global --edit to edit this global file, if this opens vim and you don't know how to use it, press i to enter Insert mode, edit the file as below, and press esc followed by :wq to exit insert mode: [inside this square brackets give a name to the followed acc.] name = github_username email = github_emailaddress [any other name] name = github_username email = github_email [credential] helper = osxkeychain useHttpPath = true

完成了!现在，当尝试从一个回购中推或拉，你会被问到哪个GitHub账户应该与这个回购链接，它只被问到一次，本地配置将记住这个链接，而不是全局配置，所以你可以在不同的回购上工作，链接到不同的账户，而不必每次编辑全局配置。

您所需要做的就是使用多个SSH密钥对配置您的SSH设置。

这个链接很容易理解(谢谢Eric): http://code.tutsplus.com/tutorials/quick-tip-how-to-work-with-github-and-multiple-accounts--net-22574 生成SSH密钥(Win/msysgit): https://help.github.com/articles/generating-an-ssh-key/

第一个环节的相关步骤:

Generate an SSH-key: ssh-keygen -t ed25519 -C "john@doe.example.com" Follow the prompts and decide a name, e.g. id_ed25519_example_company. Copy the SSH public-key to GitHub from ~/.ssh/id_ed25519_doe_company.pub and tell ssh about the key: ssh-add ~/.ssh/id_ed25519_doe_company Create a config file in ~/.ssh with the following contents: Host github-doe-company HostName github.com User git IdentityFile ~/.ssh/id_ed25519_doe_company Add your remote: git remote add origin git@github-doe-company:username/repo.git or change using: git remote set-url origin git@github-doe-company:username/repo.git

此外，如果你正在使用多个使用不同角色的存储库，你需要确保你的各个存储库有相应的用户设置覆盖:

设置用户名，电子邮件和GitHub令牌-覆盖个人回购的设置 https://help.github.com/articles/setting-your-commit-email-address-in-git/

注意: 有些人可能需要不同的电子邮件用于不同的存储库，从git 2.13开始，你可以通过编辑全局配置文件在目录的基础上设置电子邮件:~/。Gitconfig使用这样的条件:

[user]
    name = Default Name
    email = defaultemail@example.com

[includeIf "gitdir:~/work/"]
    path = ~/work/.gitconfig

然后是特定于工作的配置~/work/。Gitconfig看起来是这样的:

[user]
    name = Pavan Kataria
    email = pavan.kataria@example.com

谢谢@alexg在评论中告诉我这件事。

简单的方法，不需要处理SSH键盘

只需更改user.name & user。在回购的本地电子邮件。给那些你想要推到回购的人。

示例:我在gitlab有一个工作帐户，有一个项目。克隆这个项目/回购后，在终端中，我输入:

git config user.name "my-work-username"
git config user.email "my-work-email-id"

现在，假设我在Gitlab中有另一个个人项目/回购，我想将它与我的个人帐户关联起来。就像上面一样，克隆后，我输入:

git config user.name "my-personal-username"
git config user.email "my-personal-email-id"

希望这能有所帮助。如果对你有用就给它点赞!：）

如果您已经创建或克隆了另一个存储库，并且无法从原点或上游提取，则使用以下命令在该目录中添加ssh密钥是有效的。

这是我得到的错误:

Warning: Permanently added the RSA host key for IP address '61:fd9b::8c52:7203' to the list of known hosts.
Permission denied (publickey).
fatal: Could not read from remote repository.

Please make sure you have the correct access rights
and the repository exists.

我使用了下面的命令，这是有效的:

ssh-add ~ / . ssh / id_rsa_YOUR_COMPANY_NAME

将github中的认证方式由SSh修改为HTTP。这样它就不会关心你是否登录了你的工作github帐户，你试图远程与你的个人github帐户(它有不同的凭据，而不是你目前登录到你的本地机器)交互。

我使用shell脚本将我切换到任何我想要“活跃”的帐户。从本质上讲，您可以从头开始，正确配置一个帐户并正常工作，然后将这些文件移动到具有适当前缀的名称。从那时起，你可以使用命令“github”，或“gitxyz”切换:

# my github script
cd ~/.ssh

if [ -f git_dhoerl -a -f git_dhoerl.pub -a -f config_dhoerl ]
then
    ; 
else 
    echo "Error: missing new files"
    exit 1
fi 

# Save a copy in /tmp, just in case
cp id_rsa /tmp
cp id_rsa.pub /tmp
cp config /tmp
echo "Saved old files in /tmp, just in case"

rm id_rsa
rm id_rsa.pub
rm config
echo "Removed current links/files"

ln git_dhoerl id_rsa
ln git_dhoerl.pub id_rsa.pub
ln config_dhoerl config

git config --global user.email "dhoerl@<company>.com"
git config --global github.user "dhoerl"        
git config --global github.token "whatever_it_is"

ssh-add -D

我在这方面运气不错。我还在Xcode中创建了一个运行脚本(为Mac用户)，所以它不会构建我的项目，除非我有适当的设置(因为它使用git):

运行脚本放在Dependencies之后(使用/bin/ksh作为shell):

if [ "$(git config --global --get user.email)" != "dhoerl@<company>.com" ]
then
    exit 1
fi

编辑:添加测试新文件是否存在，并将旧文件复制到/tmp以解决下面@naomik的注释。