WiFi instaler

#!/bin/bash

if [[ $EUID -eq 0 ]];then
  echo "::: You are root."
else
  echo "::: sudo will be used."
  # Check if it is actually installed
  # If it isn't, exit because the install cannot complete
  if [[ $(dpkg-query -s sudo) ]];then
    export SUDO="sudo"
  else
    echo "::: Please install sudo or run this script as root."
    exit 1
  fi
fi

$SUDO apt update
$SUDO apt upgrade -y
$SUDO wget http://downloads.fars-robotics.net/wifi-drivers/install-wifi -O /usr/bin/install-wifi
$SUDO chmod +x /usr/bin/install-wifi
$SUDO install-wifi
echo ":-:-: DONE! :-:-:"