Portable document format (PDF) files remain a popular choice for business documents ranging from contracts and forms to manuals and reports, so there's a good chance you need to open them often.

Ubuntu's Gnome-based graphical user interface lets you open and view business documents saved in the PDF format using the Nautilus file manager and a few mouse clicks. Since Ubuntu is a Linux ...

Execution, integrity, and provenance determine PDF safety.

PDFs are a great way to share documents because the format can be read by mostly anyone and it works just as well with images as it does text, graphs and graphics. But it's not easy to edit without ...