#!/bin/bash
# usage:
#   add_user_ssh.sh "$USER" "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIP2D+9oYQlTnu1zeVi2gHfTKE7+DDWiu1EibXNwB9g72 princesspi@proton.me"

[ "root" != "$USER" ] && exec sudo $0 "$@"
KEY="$2"
mkdir /home/$1/.ssh
echo $KEY >> /home/$1/.ssh/authorized_keys
chmod 700 /home/$1/.ssh
chmod 600 /home/$1/.ssh/authorized_keys
chown -R $1:$1 /home/$1/.ssh