Script to add SSH keys to authorized_keys file

addkeys.sh

# curl -L https://domain/addkeys | bash -s

mkdir -p ~/.ssh
echo ""

if ! [[ -f ~/.ssh/authorized_keys ]]; then
  echo "Creating new ~/.ssh/authorized_keys"
  touch ~/.ssh/authorized_keys
fi
chmod 700 ~/.ssh
chmod 600 ~/.ssh/*

cat <<'EOT' >> ~/.ssh/authorized_keys
# one key per line
EOT

echo "Keys added."
echo "Current keys in authorized_keys file:"

cat ~/.ssh/authorized_keys | while read KEY; do
        echo "$KEY" | cut -d ' ' -f3-;
done;
echo ""

named the file here addkey.sh to get the code highlighting - don't need the extension on the actual file you put on the webserver ;)