I'm trying to do some plain C programming. Learned about pthread tonight.
I've recently started developing in GLib, it is certainly an interesting experience.
For plain C under Linux, I can recommend https://mentorembedded.github.io/advancedlinuxprogramming/ - full book text can be found in dowloads, but the book seemed good when I read it a few years ago
"I appreciate SDF but it's a general-purpose server and the name doesn't make it obvious that it's about art." - Eugen Rochko