Systems Engineering, Security & Linux Internals

Complex Systems Architecture,
Explained Visually.

An interactive engineering platform hosting step-by-step kernel visualizers, production incident drills, and hands-on cloud networking breakdowns.

Launch Linux Visual Lab 🚀Explore Flagship Series 📚Portfolio Resume

🎮 Visual Architecture Lab

ByteByteGo-style interactive sandboxes with state machines, syscall players, and live bit calculators.

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● Live Interactive Lab8 Modules

Linux Permissions & Inodes, Visually

Interact with the newgrp 6-step syscall player, simulate the DAC flowchart (Alice, Bob, Carol, Root), inspect task_struct → struct cred, and toggle the 16-bit i_mode calculator.

Launch Interactive Visualizer
Nov 15 · In Staging

Request-to-Shell: PHP2Shell & Node2Shell

Visual attack flow simulator: follow an HTTP request as it traverses runtime boundaries, bypasses sanitation, and executes shellcode in memory.

Flagship #2 Architecture Tool
Nov 29 · In Staging

AWS Packet Path: NACL vs Security Groups

Interactive packet journey simulator: trace traffic arriving at an AWS VPC subnet, rule evaluation order, stateless return traffic, and ephemeral port drop mechanics.

Flagship #3 Architecture Tool

📖 Flagship Articles & Cross-Platform Series

Long-form technical deep-dives syndicated across Hashnode, Medium, and our self-hosted reader.

Series: Linux InternalsFlagship #1Scheduled: 1 Nov 2026

How Linux Decides Who Can Open a File (A Visual Deep Dive)

You add a developer to a group with usermod -aG, but their open terminal gets Permission Denied. We trace the internal kernel mechanics of task_struct credentials, the 6-step syscall sequence of newgrp, in-memory Inodes, and the exact order of generic_permission().

Read Article & Interactive Guide →Hashnode Blog Medium Open Live Simulator 🎮

🏛️ The OverflowByte Architecture

Four interconnected surfaces engineered to balance interactive learning, deep narrative reading, and reference lookups.

🌐

1. Main Platform

overflowbyte.cloud (Vercel): Central hub hosting all interactive visualizers, syscall players, and tools with zero iframe limits.

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✍️

2. Flagship Blog

blog.overflowbyte.cloud (Hashnode): Narrative articles, subscriber newsletter, RSS feeds, and developer discussions.

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📚

3. Learning Second-Brain

learning.overflowbyte.cloud (Quartz): Searchable lookup vault with 40+ RHCSA/RHCE labs, command cheat sheets, and EX294 mock exams.

Open Learning Vault
📰

4. Medium Syndication

overflowbyte.medium.com: Canonical cross-posting ensuring full Google SEO credit points to our primary blog.

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Systems Engineer & Author

Pushpendra

Specialized in Linux kernel internals, systems architecture, automation with Ansible, and cloud infrastructure security. I create visual interactive tools and architectural breakdowns to make low-level systems intuitive.

Visit Full Portfolio Resume Engineering Philosophy & Focus

Core Engineering Focus

  • Linux Kernel Internals: Credential management (task_struct, struct cred, fsuid), VFS inode resolution.
  • Red Hat Certification Track: 60-day RHCSA to RHCE lab curriculum & unattended Ansible playbooks.
  • Cloud Networking: AWS VPC architecture, NACL vs Security Group packet routing, and perimeter security.