Short bio: Computer Scientist, FOSS supporter (read more)
Tux Machines (TM)-specific
With the modernization and creation of a lot of newer GUI-based tools, the shell is becoming increasingly un-required to perform many tasks. But the shell is a very powerful place, and a lot is achieved through it. A lot of the front-end GUI methods of doing things have similar ways and means to get done with using the shell. Professional Linux and UNIX users find the shell very powerful, and an introduction to at least the basic shell usage is useful.