Creates a key based passwordless SSH User and gives it sudo rights

createSSHUser.sh

#!/usr/bin/env bash

NEWUSER=$1
USERPUBKEY=$2

if [ -z "$NEWUSER" ]; then
        echo "Username required"
        exit 1;
fi

if [ -z "$USERPUBKEY" ]; then
        echo "Public key required - Enclose argument in quotes!"
        exit 1;
fi

useradd -d /home/$NEWUSER -s /bin/bash -m $NEWUSER && echo "User Created"
cd /home/$NEWUSER && echo "Changed Diretory"
mkdir .ssh && echo "Create .ssh directory"
chmod 700 .ssh && echo "Made .ssh executable"
touch .ssh/authorized_keys && echo "Created Authorised Keys Folder"
chmod 600 .ssh/authorized_keys && echo "Changed authorized keys permission"
echo $USERPUBKEY > .ssh/authorized_keys && echo "Added Pub Key"
usermod -a -G sudo $NEWUSER && echo "Added to user to SUDO"
chown -R $NEWUSER:$NEWUSER .ssh && echo "Made user ownder of .ssh dir"