This is a small old tip, but I want to share it here, in case it may be useful for someone.
Also as a note to myself, as I usually forget how to do it.
So, if you need to print from the command line, and assuming you already have the printer installed and working.
This will print the file on the default printer
lpr -P printername file
This will print the file on a specific printer, in this case named “printername”.
lpr -P printername -#3 file
This will print the file on the printer “printername”, and will print 3 copies.
lpr -p file
Print a pre-formated file with a shaded header containing, he date, time, job name, and page number.