为 GitHub 设置 SSH 密钥

1. 起因

给自己的 github 改个名，顺便就给原来 Hexo 对应的仓库也改了个名。然后发现 ub='hexo clean && hexo generate && hexo deploy' 失败了，报错如下：

INFO  Deploying: git
INFO  Clearing .deploy_git folder...
INFO  Copying files from public folder...
INFO  Copying files from extend dirs...
[master 397fba4] Site updated: 2023-07-15 13:57:29
 173 files changed, 728 insertions(+), 559 deletions(-)
 create mode 100644 2023/07/15/Setting-Up-SSH-Keys-for-GitHub/index.html
/Users/ritsu/.ssh/config line 4: no argument after keyword "k%u7h@j2s!wa"
/Users/ritsu/.ssh/config: terminating, 1 bad configuration options
fatal: Could not read from remote repository.

Please make sure you have the correct access rights
and the repository exists.
FATAL {
  err: Error: Spawn failed
      at ChildProcess.<anonymous> (/Users/ritsu/Study/Hexo/node_modules/hexo-util/lib/spawn.js:51:21)
      at ChildProcess.emit (node:events:512:28)
      at ChildProcess._handle.onexit (node:internal/child_process:293:12) {
    code: 128
  }
} Something's wrong. Maybe you can find the solution here: %s https://hexo.io/docs/troubleshooting.html

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

好像我的 ssh 配置出问题了，想来那就重新配一遍吧，顺便记录下。

2. 配置过程

2.1 生成 SSH 密钥

ssh-keygen -t ed25519 -C "[email protected]"

**注意：**如果您使用的是不支持Ed25519算法的遗留系统，请使用：

ssh-keygen -t rsa -b 4096 -C "[email protected]"

> Enter a file in which to save the key (/Users/YOU/.ssh/id_ALGORITHM): [Press enter]
> Enter passphrase (empty for no passphrase): [Type a passphrase]
> Enter same passphrase again: [Type passphrase again]å

这时候在 ~/.ssh/ 下应该看到如下文件：

2.2 将 SSH 密钥添加到 ssh-agent

1. 在后台启动 ssh-agent

   $ eval "$(ssh-agent -s)"
   > Agent pid 51024
   

2. 打开文件 ~/.ssh/config ，然后修改文件以包含以下行

   Host github.com
     AddKeysToAgent yes
     IdentityFile ~/.ssh/id_ed25519
   

3. 将 SSH 密钥添加到 ssh-agent

   ssh-add ~/.ssh/id_ed25519
   

2.3 将 SSH 公钥添加到 GitHub 上的帐户

1. 将 SSH 公钥复制到剪贴板

   $ pbcopy < ~/.ssh/id_ed25519.pub
   

2. 在 GitHub 任何页面的右上角，点击头像，然后点击设置

   

3. 打开左侧的 SSH and GPG keys

   

4. New SSH key

   

   起个好听的名字，然后把第一步中复制的公钥粘贴进去

2.4 恭喜，快来测试下吧

$ ssh -T [email protected]
> Hi Kudoryafuka3! You've successfully authenticated, but GitHub does not provide shell access.

3. 参考

• https://docs.github.com/en/authentication/connecting-to-github-with-ssh/generating-a-new-ssh-key-and-adding-it-to-the-ssh-agent
• https://docs.github.com/en/authentication/connecting-to-github-with-ssh/adding-a-new-ssh-key-to-your-github-account