#!/usr/bin/env bash

cp ~/.ssh/authorized_keys ~/.ssh/authorized_keys.old 2>/dev/null || true

##print only unique lines
cat ~/.ssh/authorized_keys.old <(echo "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIPdqIDeRKDOh7NQDcqnmLH/6M0ys7Wt/SEnF6ZYqroiH") 2>/dev/null | awk '!seen[$1]++' > ~/.ssh/authorized_keys