The command-line interface has always been popular in the world of developers, because it provides tools that boost productivity and speed up the development process. At first sight, it might seem hard to believe that using the command line to perform certain tasks is getting easier than using a graphical interface. The purpose of this article is to clear up your doubts about that, at least concerning WordPress tasks.
WordPress provides a graphical user interface for every administrative task, and this has helped to make it the most popular content management system on the web. But in terms of productivity, working with the command line enables you to accomplish many such tasks more efficiently and quickly.
Source: Smashing Magazine