This is an example of the SSH config you would want to use when you have two accounts to manage your git repositories. The one I use is a private repository based in gitlab and the other, a public repository in github.

To connect to the private repository through SSH, follow these steps:

  1. If you are on windows, I recommend using Git Bash since it already has ssh-keygen pre-installed
  2. Generate an ssh key with the email id associated with the private repository. 
     ssh-keygen -t rsa -C "email@private.company"

    This will take you through a series of steps. Make sure you assign a good name for your key, like id_rsa_private_repo

  3. If the above command doesn’t work, You might have to do this first (to run ssh-agent) 
    eval `ssh-agent -s`
  4. Copy your public key. 
     type %your_home_folder%\.ssh\id_rsa_private_repo.pub | clip

    Add this to the list of SSH keys in your private repository website.

  5. Generate another key for your github repository, which could be named id_rsa_github for example.
  6. Since these keys don’t have the default name, they have to be added using ssh-add 
    ssh-add ~/.ssh/id_rsa_private_repo
ssh-add ~/.ssh/id_rsa_github

  7. Create a config file in your .ssh directory inside your home folder. It should look something like this:

     # Private repository account
 Host privateRepo
     HostName base.url.to.private.repository
     User git
     RSAAuthentication yes
     IdentityFile ~/.ssh/id_rsa_private_repo

 # Github account
 Host github
     HostName github.com
     User git
     RSAAuthentication yes
     IdentityFile ~/.ssh/id_rsa_github
  8. Now, when you need to clone a project from the private repository, you will have to git clone privateRepo:project_name.git
  9. Now, before you can make changes, commit, make pushes or pulls, you will have to add this repo address to origin. git remote add origin privateRepo:project_name.git