Not really, it's a fraction of the basic functionality of bash, which is not to be learned from a mosaic of random blogposts, but from something more complete. If you want something "more special", try, for example, Unix Power Tools book.
Of course its just basics, its a good start for beginners. It reminds me of the stuff I used to teach to junior programmers wanting to explore Linux.. Im already an advanced Linux user, but there's always something you haven't come accross yet... Thats one of the things I like best about Linux in general and bash.