Bash script to add a new SSH key to your GitHub account

git-add-key.sh

rm -rf ~/.ssh/id_rsa ~/.ssh/id_rsa.pub
read -p "Enter github email : " email
echo "Using email $email"
ssh-keygen -t rsa -b 4096 -C "$email"
ssh-add ~/.ssh/id_rsa
pub=`cat ~/.ssh/id_rsa.pub`
read -p "Enter github username: " githubuser
echo "Using username $githubuser"
read -s -p "Enter github password for user $githubuser: " githubpass
curl -u "$githubuser:$githubpass" -X POST -d "{\"title\":\"`hostname`\",\"key\":\"$pub\"}" https://api.github.com/user/keys

This should be changed to reflect Githubs current policy
read -p "Enter Github email : " email
echo "Using email $email"
s $ ssh-keygen -t rsa -b 4096 -C "$email"

This should be changed to reflect Githubs current policy
read -p "Enter Github email : " email
echo "Using email $email"
s $ ssh-keygen -t rsa -b 4096 -C "$email"

Cool, thanks. I haven't used github in years. I updated the script with your comment :)

i found the rm -rf a bit aggressive, wanted to use existing keys if present, and further support two-factor-auth. here's my flavor! thx for the boilerplate :)

function git_upload_ssh_key () {
  read -p "Enter github email : " email
  echo "Using email $email"
  if [ ! -f ~/.ssh/id_rsa ]; then
    ssh-keygen -t rsa -b 4096 -C "$email"
    ssh-add ~/.ssh/id_rsa
  fi
  pub=`cat ~/.ssh/id_rsa.pub`
  read -p "Enter github username: " githubuser
  echo "Using username $githubuser"
  read -s -p "Enter github password for user $githubuser: " githubpass
  echo
  read -p "Enter github OTP: " otp
  echo "Using otp $otp"
  echo
  confirm
  curl -u "$githubuser:$githubpass" -X POST -d "{\"title\":\"`hostname`\",\"key\":\"$pub\"}" --header "x-github-otp: $otp" https://api.github.com/user/keys
}

Is there a way to check if the user uses two-factor auth and only ask for it if they do? ideally the script should cover both cases. If you can take care of that part I'll update the gist to your version which looks much better :)

I made a little script that also does this but allows you to keep several names at once, it also contains some more explanation and walkthrough on the page. Hopefully this is useful to someone, as I found this process quite opaque when I first had to do it for my private repositories:

https://github.com/morganrivers/how_to_ssh_key