System calls: how programs talk to the Linux kernel
System calls are how programs ask the kernel to do things. Learn how they work, how to trace them, and why this gives you troubleshooting superpowers.
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The Linux kernel is just a program
Most books and courses introduce Linux through shell commands, leaving the kernel as a mysterious black box doing magic behind the scenes. In this post, we will run some experiments to demystify it: the Linux kernel is just a binary that you can build and run.