install-udpgw.sh

#!/bin/sh
OS=`uname -m`;
sudo wget -O /usr/bin/badvpn-udpgw "https://raw.githubusercontent.com/daybreakersx/premscript/master/badvpn-udpgw"
if [ "$OS" == "x86_64" ]; then
  sudo wget -O /usr/bin/badvpn-udpgw "https://raw.githubusercontent.com/daybreakersx/premscript/master/badvpn-udpgw64"
fi
sudo touch /etc/rc.local
echo "\nscreen -AmdS badvpn badvpn-udpgw --listen-addr 127.0.0.1:7300" | sudo tee -a /etc/rc.local
sudo chmod +x /usr/bin/badvpn-udpgw
sudo screen -AmdS badvpn badvpn-udpgw --listen-addr 127.0.0.1:7300

@illmanner sudo apt install screen

@alishahidi fixed thanks