It seems it's complicated for activating USB printer in linux.
I just follow the guide book said:

(1)make sure the USB printer module is on.
printer
usb-uhci
usbcore

(2)command
cat document.txt > /etc/lp

My epson c61 is always not working!!!
( It's ok in windows , of course. )

Could anyone guide me step by step?
Linux printing is annoying!!!
(Both X or console mode are welcome!)

===
My OS is RedHat9 , kernal 2.4.20-8

Its important to let people know what distribution you are using. Try configuring your printer using the cups configuration utility located at http://localhost:631 using your web browser.

I just follow the advice.
But , it's still not working...
Distribution is RedHat9 , kernal 2.4.20-8

could someone have console mode setup procedure?

What make of printer is it?

A printer is a device and the drivers will be in /dev not /etc . The device lp in "nix" refers to Line Printer which would normally be associated with a parallel device so with the foregoing explanation the correct command would be;

cat document.txt > /dev/usb/lp0 or slightly easier way of testing a printer is to tell it to send the date i.e. date > /dev/usb/lp0 (note that a paper pickup error on the printer may occur requiring a page forward on the printer panel)

explanation for the above is send the contents of date or document.txt to /device/usb/LinePrinter0

If this does not work check that the system is actually seeing the printer - cat /proc/bus/usb/devices

you should see the printer listed if not then you have not installed the correct drivers.

If the printer is being seen as above and is working fine I also recommend using cups-system for good quality printing and control.