当我在同一台计算机上使用多个 github 帐户推送时，git 上发生错误，即使我设置了 SSH

Question

I made a new git local repository and I tried to do push with git push origin master for the first time, but I caught the error below:

Warning: Permanently added the RSA host key for IP address '52.192.72.89' to the list of known hosts.
git@github.com: Permission denied (publickey).
fatal: Could not read from remote repository.

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

According to my searching, it seems this is the common case which happens when one tries to use multiple github accounts in one computer machine, and that's exactly what I'm doing.

I've already tried the common solution of setting SSH for all the github accounts I have in my computer. I made the directory of .ssh and set the required files like this:

.ssh/
　├ config
　├ id_myGithubAccount1_rsa
　├ id_myGithubAccount1_rsa.pub
  ├ id_myGithubAccount2_rsa
　├ id_myGithubAccount2_rsa.pub　　
　└ known_hosts

id_myGithubAccountX_rsa is of course the RSA secret key of myGithubAccountX (X = 1,2) and .pub is the public key of it.

The content of config file is as following:

Host github-myGithubAccount1
  User git
  Port 22
  HostName github.com
  IdentityFile ~/.ssh/id_myGithubAccount1_rsa
  


Host github-myGithubAccount2
  User git
  Port 22
  HostName github.com
  IdentityFile ~/.ssh/id_myGithubAccount2_rsa

The content of "known_hosts" is as following:

github.com,13.114.40.48 ssh-rsa [Many characters] ==
52.69.186.44 ssh-rsa [many characters]==

After that, I tried to use git of myGithubAccount2 with the commands below:

git remote add origin git@github.com:<ACCOUNT_NAME>/<YOUR_REPSITORY>.git

and

$ git config --global user.name "<YOUR_NAME>"
$ git config --global user.email <YOUR_EMAIL>

Then, I put ssh -T github-myGithubAccount2 and I've got the message below:

Hi myGithubAccount2! You've successfully authenticated, but GitHub does not provide shell access.

Many articles in the Web say this is all and we can use git of myGithubAccount2 . However, the result is the beginning of this question.

What is wrong?

Answer 1

I tried to use git of myGithubAccount2 with the commands below:

 git remote add origin git@github.com:<ACCOUNT_NAME>/<YOUR_REPSITORY>.git

That does not use myGithubAccount2

git remote set-url origin github-myGithubAccount2:<ACCOUNT_NAME>/<YOUR_REPSITORY>.git

That would use the right key.

It needs to use the exact Host entry 'github-myGithubAccount2' from the ~/.ssh/config file.