It is sometimes very convenient to print files from the command line, especially when you want to print a lot of them.
You can print multiple pdf files, by running the command
lp -d Your_Printer_name Filenames
Your_Printer_name is the one you defined on your system. Check with your CUPS configuration by visiting
http://localhost:631/printers.
Example of how to issue command:
lp -d KONICA-MINOLTAC280 *.pdf
Try with other file formats than pdf.
You can also call lp without specifying a printer name to use your default configured printer: