Linus Torvalds torvalds/linux: Linux kernel source tree raspberrypi/linux: Kernel source tree for Raspberry Pi Foundation-provided kernel builds. Issues unrelated to the linux kernel should be posted on the community forum at https://www.raspberrypi.org/forum
The kernel is the most important piece in the operating system. It allows the hardware to talk to the software. It also does a whole lot of other things, but we’ll dig into that in a different course. For now, just know that the kernel controls pretty much everything that happens on your system.