Multiple SSH Keys for Multiple Github Accounts

Generate another ssh key

# generate ssh key and save to `id_rsa_another`
$ ssh-keygen -t rsa -C "[email protected]"

# save your key
$ ssh-add ~/.ssh/id_rsa
$ ssh-add ~/.ssh/id_rsa_another

# delete all your cached keys
$ ssh-add -D
# list all your saved keys
$ ssh-add -l

add the public key id_rsa_another.pub to github through github setting

edit your ssh config file under ~/.ssh/config

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

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

Modify git config

$ git config user.name "username"
$ git config user.email "[email protected]" 

Change your git remote

e.g. you have to change [email protected]:githubutilities/homebrew-cask.git to [email protected]:newusername/homebrew-cask.git for this to works

your can run git remote -v to get the push url.

Now you can commit your changes

Reference

• jexchan's gist
• stackoverflow
• simplify your life using ssh config file