Launch Gnome Terminal. Navigate to the directory containing the PDF file you want to print using the "cd" command. For instance, if your file is in the "Documents" folder, type "cd Documents" and ...

For example, if you want to open a PDF file, type: xdg-open . my-pdf.pdf. If you have an image file, type: xdg-open . wallpaper4.jpg. Similarly, you can open any kind of file, like an MP3 or video ...

While you can manually enter the commands to edit files in Terminal editors, in OS X you can set up a service to open files in a desired terminal editor from the Finder's contextual menu.