github-SSH key,Key is already in use

参考：Managing deploy keys - GitHub Docs

很久注册过几个github账号，但是添加sshkey的时候，报错： Key is already in use

github文档也有过这样的描述

GitHub - Key is already in use

When attempting to add a deployment key to a GitHub repository, such as in the case of needing access for a submodule, or fetching remote dependencies within your build pipeline, you may run into the following error:

Key is already in use

This is because your DeployHQ project's public key has already been added to GitHub, most likely as the deployment key for the main repository you're trying to deploy.

Github does have a restriction that only allows a deployment key to be used on a single repository, but they offer a solution whereby you can create a machine (non-human) user and assign the deployment key to that user, which will then be given access to multiple Github repositories.

同一个SSH key在不同的账号添加不允许

解决方案：

创建其他的SSH key

命令：ssh-keygen -t rsa -C 'xxxxxx.com' -f ~/.ssh/id_rsa_github

一定要注意跟原来的密钥的命名区别id_rsa、id_rsa_github

一直enter就可以了

ssh-add id_rsa_github

ssh-add id_rsa

验证是否成功：

 ssh -T git@github.com

出现：Hi xxxx! You've successfully authenticated, but GitHub does not provide shell access.

则为成功

 cat id_rsa_github.pub 查看密钥

添加到ssh key中， 重新push成功