You found some bookmarks.
These are places or blog posts from around the internet that I have found particularly useful.
Paul’s Online Math Notes
Good resources for reviewing material such as Calculus and Differential Equations
The Not So Short Introduction to LaTeX
It’s not short, but a great place to start learning LaTeX
Package Users
A strategy for managing locally installed software using only Unix built-ins
skarnet.org
High quality software, including a set of general-purpose C programming
libraries, the execline scripting language,
and a suite of small and secure supervision utilities
Void Linux
Looking for a Linux distribution?
It might not be for beginners, but Void Linux is a robust
versatile Linux distribution.