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 ...

It blends Vim-style navigation with strong visual feedback, which makes it one of the most approachable keyboard-driven file ...

There's a lot to learn about image files on the command line, from verifying file format to finding out where and when photos were taken and maybe even getting an unusual view of what they look like.