# Linux Internals for Backend Engineers This path focuses on Linux concepts that show up in backend, infrastructure, and production debugging work. ## Path 1. [[Topics/Linux & Systems]] - Start with the main topic hub. 2. [[Articles/Tracing System Calls at a High Level]] - Understand the user space to kernel space boundary. 3. [[Articles/File Descriptors Part 1]] - Learn what file descriptors are. 4. [[Articles/File Descriptors Part 2]] - Learn what file descriptors point to. 5. [[Field Notes/File Descriptor]] - Keep a short reference close by. 6. [[Field Notes/Page Cache]] - Start building the mental model for Linux I/O performance. ## Related - [[Learning Paths/Zero to Production Engineer]]