Kernel, Device, and Communications Mode Configuration

The default kernel has support for the parallel and serial ports built into it, as well as basic USB support; so unless you have built a custom kernel and removed support for these ports, you shouldn’t have any problems. The easiest way to check for parallel or serial support in the kernel is by checking whether it detected those ports at boot time and emitted kernel messages corresponding to them. These kernel boot messages are available throughout the computer’s uptime in the file /var/run/dmesg.boot. Use the grep command to search through this file for any mention of the device corresponding to your printer: ppcN for parallel printers, sioN for serial printers, or ulptN for USB printers. ...

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