I understand that a command such as 'lptest 20 10 > /dev/lp1' (or lp0) will print a test page to a parallel port printer assuming the device file properly links to the printer. I have a usb printer instead (as well as a kernel that supports it, and the device file '/dev/usb/lp0' with the, i think, correct major and minor numbers 180, and 0). I know I need to install drivers for the printer, but are the drivers nessicary for a simple test like 'lptest 20 10 > /dev/usb/lp0'? I don't get any error messages from this command, but the printer doesn't do anything. I think i'm a little confused about the usb filesystem as well. I mean, typically to access a device you mount a device file such as /dev/fd0. But to mount the usb filesystem you mount 'usbdevfs'. Why is that? Anyway, back to the point: I know there are programs such as printtool that will automatically configure the printservices, but I would prefer to do without them. So a simple "yes, you need this driver to execute that command" (which i think is unlikely because according to linux-usb.org the driver is in the kernel) or "no, here's the problem:" would be good for now (in addition to some explanation of why a seperate usbdevfs was created). thanks
