profile# K Datta Darshan (TommyFenrir)
Cybersecurity | Systems Programming | Linux | C | Bash
Founder/Admin of Fenrir Security Systems
I build security tools, automation scripts, and terminal-first projects. Focused on Linux internals, offensive security fundamentals, and low-level computing.
- CEH preparation (practical cybersecurity fundamentals)
- Systems programming in C
- Linux kernel development roadmap (long-term)
- Unix / Shell scripting & automation
- Linux environments & CLI workflows
- Bash scripting & automation
- Python scripting (security + tooling)
- C (systems-level learning path)
- Networking fundamentals
- SSH / remote system administration
- Nmap, Gobuster, Aircrack-ng
- Digispark / Digistump payload development
- Ollama (local LLM workflows + Modelfiles)
- Gemini CLI + Gemini API (grounding & automation)
- Dislocker (BitLocker recovery workflows)
- Tailscale / Tailnet based remote infrastructure
CLI-based music player written entirely in Bash (mpv backend).
A minimal, ad-free music experience designed for Linux power users.
USB automation + payload experiments (educational & security research use cases).
Custom Modelfiles and local LLM setups for security workflows and experimentation.
A CLI tool built using Gemini API grounding services, capable of web-assisted Q&A
and terminal-based browsing style workflows.
- TryHackMe: Advent of Cyber (24 Days Event)
- Hack The Box: CTF Participation Certificate
- TCM Security: Linux 101 Certificate
I run Fenrir Security Systems, a GitHub organization where I manage projects and collaboration workflows.
Experience gained:
- Team coordination (5 members) and task distribution
- Repo moderation, testing workflows, and project SOP management
- Server environment setup and SSH-based collaboration
- Basic SOC-style monitoring and login alert automation (msmtp)
- Infrastructure management using Tailnet
Become a Linux Systems Engineer specializing in security and low-level computing.
GitHub: https://github.com/tommykfenrir
Organization: https://github.com/Fenrir-Security-Systems
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