$ wget -O usbprinter.sh https://raw.githubusercontent.com/Visine/usbprinter/master/usbprinter.sh
$ chmod +x usbprinter.sh
or
$ curl -Lo usbprinter.sh https://raw.githubusercontent.com/Visine/usbprinter/master/usbprinter.sh
$ chmod +x usbprinter.sh
$ sudo ./usbprinter.sh