Sockets & Network IPC
Learn about Unix domain sockets, TCP/UDP sockets for local and network IPC, socket pairs, and advanced socket options for high-performance inter-process communication.
Posts in technical
System Call Security
Syscall filtering, seccomp, capability-based security, and least privilege in Linux
The Concurrency Problem
Race conditions, shared mutable state, and why simultaneous access breaks things
Threads & Lightweight Processes
Understanding user threads vs kernel threads, thread pools, and thread models for concurrent programming in modern operating systems.
User & Group Management
UID/GID, privilege escalation, setuid binaries, and PAM authentication in Linux
Virtual File Systems (VFS)
Understanding how Linux abstracts multiple file systems through a common interface, enabling transparent access to ext4, NTFS, FAT, and network file systems.
Virtual Memory
How operating systems use disk as an extension of RAM through demand paging, and the page replacement algorithms — LRU, Clock, Working Set — that decide what gets evicted.
Virtualization Basics
Explore hypervisors, virtual machines, containers, and OS-level virtualization — understanding the technologies powering cloud computing.
Complexity Justification: Proving Algorithm Correctness
Learn to rigorously justify and communicate algorithm complexity — deriving time and space bounds, proving correctness, and presenting analysis in interviews.
Space Complexity Analysis: Measuring and Optimizing Memory
Master space complexity analysis — learn how to measure, analyze, and optimize the memory footprint of algorithms from O(1) to O(n²) and beyond.