How do I push to GitHub under a different username?

Question

A friend and myself are sharing my computer. I\'ve made pushes to GitHub using the git bash shell on Windows 7. Now we\'re in a different project on that computer and I need

Answer 1

I have been using one machine to push code to two different GitHub accounts with different username. Assuming you already set up one account and want to add a new one:

1. Generate new SSH key ssh-keygen -t rsa -C "myaddress@example.com"
2. Save it, but remember not to override the existent one id_rsa. Give it a different name, e.g. id_rsa_another
3. Copy the contents of the key to your GitHub account:

Settings -> SSH and GPG keys -> New SSH key -> Give a label and paste the key -> Add SSH key

4. Add the key to the ssh agent: ssh-add ~/.ssh/id_rsa_another
5. Setup a GitHub host: Create a config file with touch ~/.ssh/config and edit the file by providing configurations to your accounts:

#first account
Host github.com-first
    HostName github.com
    User git
    IdentityFile ~/.ssh/id_rsa

#another account
Host github.com-another
    HostName github.com
    User git
    IdentityFile ~/.ssh/id_rsa_another

Now you should be able to push from different accounts depending on what key you add to the ssh agent, i.e. to use your first account, do ssh-add ~/.ssh/id_rsa.

You might also want to change your user email:

git config --global user.email "myaddress@example.com"

or clean out ssh keys in case of permission error when pusing code to one of the accounts:

ssh-add -D