Linux Core Subsystems: One-Page Reference Map
Overview This is a one-page cheat sheet for Linux kernel subsystems. Each subsystem controls a critical resource; understanding them is essential for troubleshooting, optimization, and security.
Why understanding subsystems matters:
Imagine your server is slow. Without subsystem knowledge, you’re guessing:
“Maybe add more RAM?” (might be CPU scheduler issue) “Maybe faster disk?” (might be memory cache problem) “Maybe more CPU?” (might be I/O scheduler misconfiguration) With subsystem knowledge, you diagnose systematically:
…