Github with multiple keys

While I was working with my Opensource project https://github.com/OnToology/OnToology

I needed to have multiple Github keys for django tests. Below is how I did it:

Assumptions:

• You are running Linux, Unix or Mac.
• You have git installed.
• You have github account.
• You know the basics of git.

1- First of all, generate the first key and second key (running the same command twice) don't forget to name them differently (in this example I named them id_rsa_key1 and id_rsa_key2) 

ssh-keygen -t rsa -C "your_email@youremail.com"

2-Add the generate keys, id_rsa_key1.pub and id_rsa_key2 to Github (follow the intstructionin the first link the resources below )
3- Run the below command to add the two keys

ssh-add ~/.ssh/id_rsa_key1
ssh-add ~/.ssh/id_rsa_key2

4- Create a file ~/.ssh/config and write the below

Host github.com-user1
    HostName github.com
    User git
    IdentityFile ~/.ssh/id_rsa_key1


Host github.com-user2
    HostName github.com
    User git
    IdentityFile ~/.ssh/id_rsa_key2

5- User one Github key/user

$ git config user.name "user1"
$ git config user.email "user1@gmail.com" 

OR
$ git config user.name "user2"
$ git config user.email "user2@gmail.com" 




Note: What works for me is to have only one key loaded, to check loaded keys run "ssh-add -l", and to remove a key use "ssh-add -d yourkeydirectory".I created somefunction, maya separate script lateron on to manipulate different kinds of keys https://github.com/OnToology/OnToology/blob/master/OnToology/tests/__init__.py

Resources:
https://help.github.com/articles/generating-ssh-keys/
https://gist.github.com/jexchan/2351996