同時使用：gitlab & github

生成密鑰

gitlab 密鑰

ssh-keygen -t rsa -C "gitlab 用戶郵箱地址" ←┘
Generating public/private rsa key pair.
Enter file in which to save the key (/Users/user/.ssh/id_rsa): ←┘
Enter passphrase (empty for no passphrase): ←┘
Enter same passphrase again: ←┘
...

github 密鑰

ssh-keygen -t rsa -C "github 用戶郵箱地址" ←┘
Generating public/private rsa key pair.
Enter file in which to save the key (/Users/user/.ssh/id_rsa): id_rsa_github ←┘
Enter passphrase (empty for no passphrase): ←┘
Enter same passphrase again: ←┘
...

~/.ssh/ 目錄下生成如下文件:

- id_rsa
 - id_rsa.pub 
 - id_rsa_github
 - id_rsa_github.pub

分別將 id_rsa.pub 和 id_rsa_github.pub 內容複製到 gitlab 或 github 的 ssh key 中

添加 config 文件

# gitlab
Host gitlab
    HostName gitlab.com
    IdentityFile ~/.ssh/id_rsa

# github
Host github
    HostName github.com
    IdentityFile ~/.ssh/id_rsa_github

測試鏈接

gitlab

ssh -T git@gitlab.com ←┘
The authenticity of host 'gitlab.com (52.167.219.168)' can't be established.
ECDSA key fingerprint is SHA256:HbW3g8zUjNSksFbqTiUWPWg2Bq1x8xdGUrliXFzSnUw.
Are you sure you want to continue connecting (yes/no)? yes ←┘
...
Welcome to GitLab, username!

github

ssh -T git@github.com ←┘
The authenticity of host 'github.com (52.167.219.168)' can't be established.
ECDSA key fingerprint is SHA256:HbW3g8zUjNSksFbqTiUWPWg2Bq1x8xdGUrliXFzSnUw.
Are you sure you want to continue connecting (yes/no)? yes ←┘
...
Hi username! You've successfully authenticated, but GitHub does not provide shell access.

會在 ~/.ssh/ 目錄下自動生成 known_hosts 文件

測試鏈接失敗，Permission denied (publickey).

緣由是，咱們自定義了 id_rsa_github 鑰匙名，默認狀況下，鏈接會搜索 id_rsa 鑰匙名，因此這裏會失敗
能夠經過 ssh -T -v git@github.com 瞭解鏈接失敗的具體緣由

ssh-agent

# 開啓 agent
eval $(ssh-agent -s) ←┘
Agent pid 8428

# 添加 鑰匙名
ssh-add ~/.ssh/id_rsa_github ←┘
Identity added: /c/Users/user/.ssh/id_rsa_github (/c/Users/user/.ssh/id_rsa_github)

# 查看 agent list
ssh-add -l ←┘
8428 SHA256:A9UcJMadwTpF7TvsT5LEXsSssTs5qehmV9Q2Q8Ntw3o /c/Users/user/.ssh/id_rsa_github (RSA)

# 不用時能夠關閉 agent
eval $(ssh-agent -k) ←┘
Agent pid 8428 killed

注意：使用github時，記得在本身的項目下定義 local user.name 和 local user.email

git config --local user.name ''
git config --local user.email ''