#Linux

I wasted 50% of my disk space because I didn't know the difference between Copy and Link. Deep dive into Inode, the secret of `rm` command, and why `pnpm` is faster than `npm`.

How OS creates the illusion of multitasking. Preemptive vs Non-preemptive, The Starvation problem, and how modern OSs use Multi-Level Feedback Queue (MLFQ) and Red-Black Trees (Linux CFS) to keep everyone happy.

The ultimate guide for Engineers. Includes Architecture Deep Dive, 20-term Glossary, 10-item FAQ, and detailed Security Hardening checklists.

Why BST degrades to linked lists. The 5 rules of Red-Black Trees, Left/Right Rotations visualization, and why Linux CFS and Java use it over AVL Trees.

Developers must use Mac? That was before WSL2. Planting Linux Kernel inside Windows.

Processes are isolated. But how do Chrome tabs exchange data? From Pipes to Sockets.

Not a Demon. It's the 'Guardian Spirit' from Greek mythology. Heroes of the server working silently in the background.

Senior dev said 'just chmod 777 it'. Turns out, that was reckless advice. Secrets of rwx and numbers.

Shell is not the core of OS. It's just a 'Messenger' passing user commands to Kernel. The real role of zsh and bash.

If an OS is a collection of programs, who is the core? Identity of the Kernel that always stays in memory.

From DRAM leakage currents to ECC, HBM, and real benchmarks (fio, sysbench). A developer's guide going beyond simple analogies.

What happens inside when you turn on a computer? A detailed breakdown of the 6 stages of Linux booting. Covering Dual Booting, Secure Boot, Kernel Modules, Systemd Unit Files, and troubleshooting with Journalctl.