Sure, using the Linux command line is optional. But these are commands I depend on every day. See what you think.

The tree command is perfect for viewing your entire directory structure at a glance. It shows folders and files in a clear, ...

When an application doesn't respond, it's usually accompanied by it gobbling up system resources. Should that application consume all your remaining CPU or RAM, your system could become unresponsive, ...

The days that PDFs were the granny-proof Swiss Army knives of document sharing are definitely over, according to [vk6]. He has managed to pull off the ultimate mind-bender: running Linux inside a PDF ...