Love it or hate it, the command line is here to stay. Sure, there are new options emerging like TermKit but it’s unlikely that the command line will ever really go away. Those who take the time to master it can run productivity circles around their peers, but with the astonishing assortment of CLI tools available, where do you even begin? We’ve compiled a few of the most useful tools and tricks into this guide to help new users gain some new knowledge, and old pros learn some new tricks.

Love them or hate them – CAPTCHAs have become ubiquitous on the Internet. What is CAPTCHA anyway, and where did it come from? Responsible for eye-strain the world over, the humble CAPTCHA has been the centre of much attention as the single most effective weapon in the fight against web spam. But are they effective? Are there any other kinds of CAPTCHA other than the basic “tilt your head, squint and read me”?