由于名称解析错误，Github 与 ssh 的连接失败

Question

我已经用我的 github 帐户注册了一个 ssh 密钥。 钥匙在

~/.ssh/id_rsa_github_snail
~/.ssh/id_rsa_github_snail.pub

我有一个 repo，其中远程 url 配置为使用 ssh：

$ git remote -v
origin  git@github.com:danielsank/pong.git (fetch)
origin  git@github.com:danielsank/pong.git (push)

但是，当我尝试从公司计算机推送时，我收到以下错误消息

danielsank@snail:~/src/pong$ git push
ssh: connect to host github.com.<company>.<name>.com port 22: Connection timed out
fatal: Could not read from remote repository.

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

请注意，由于某种原因，ssh 尝试连接到 github.com.<company>.<name>.com 而不是 github.com。

我在/etc/resolve.conf中发现了以下可疑位：

# It is common within <company> to lookup hostnames with a dot in it like for an
# example '<machine>.<site>'. We set 'options ndots:2' so that such hostnames
# get tried first with the <company> search domains appended. Without this such
# queries might be tried first against an external DNS resolver.
options ndots:2

我可以 ping github.com。

我尝试将网址设置为git@github.com.:danielsank/pong.git。 之后，当我尝试推送时，我被要求接受来自 github 的主机指纹，但随后出现不同的错误：

Permission denied (publickey).
fatal: Could not read from remote repository.

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

我想这是由于 repo 名称中的额外点而发生的。

是否有解决此配置的好方法？ 如果不附加公司名称，决议不会再试一次，我有点惊讶......

---

Answer 1

您在/etc/resolve.conf 或公司的名称服务器中似乎有奇怪的 DNS 设置。要防止这些 DNS 设置将 .<company>.<name>.com 附加到带有点的主机名，请在主机名末尾附加一个点：

ping github.com. # <- note the dot!
git remote set-url origin git@github.com.:danielsank/pong.git

关于第二个问题——如果你想使用非标准名称的密钥，你可以将密钥分配给~/.ssh/config中的主机：

Host github.com github.com.
    User git
    IdentityFile ~/.ssh/id_rsa_github_snail