ssh-keygen -t rsa -b 4096 -N '' -C "your-email@gmail.com" -f ~/.ssh/id_rsa
ssh-keygen -t rsa -b 4096 -N '' -C "your-email@gmail.com" -f ~/.ssh/github_rsa
ssh-keygen -t rsa -b 4096 -N '' -C "your-email@gmail.com" -f ~/.ssh/mozilla_rsa