Not to diminish the value of the article (which seems well written and probably useful to some), but do these really count as "tricks"? That seems analogous to calling variable assignment a C programming "trick".
This probably comes from learning Unix via graphical interfaces, such as GNOME on Ubuntu, OS X, etc., and blog posts by other people with the same background.
Kernighan and Pike's _The Unix Programming Environment_ is probably still the best place to learn this stuff.
Normally it goes something like this:
A: I have problem X with Y.
B: Oh I don't know anything at all about Y, but if you migrate to Z I bet you won't have the problem any more.
A: Okay I'll do that. Thanks!
or:
A: I have a problem X with Y.
B: Oh did you try (completely unrelated irrelevant thing)
A: No, but I will. Thanks!
Seriously.
Unfortunately, Linux newbies searching for help may run across bad advice from people with barely more experience, creating a feedback loop.