Other people's work that I keep coming back to. If it helped me, it might help you.

• The Linux Programming InterfaceMichael Kerrisk. The reference for the Linux side of things. I use it selectively, not cover to cover.
• Computer Systems: A Programmer's PerspectiveBryant and O'Hallaron. I'm taking notes on chapters 5 and 6.
• A Tour of C++Bjarne Stroustrup. The short version of the whole language.
• Beautiful C++: 30 Core GuidelinesJ. Guy Davidson and Kate Gregory. On writing C++ that you can read later.

• What Every Programmer Should Know About MemoryUlrich Drepper. A long paper on exactly what the title says.
• Julia EvansSystems things, explained until they stop being scary. With drawings.
• Brendan GreggPerformance, mostly on Linux.
• Dan LuuLong posts, with measurements.
• Fabien SanglardGame engines and old hardware, taken apart.
• Compiler ExplorerType C++, see the assembly.

No tracking. Nothing here is trying to get you to do anything.