Technical logs, engineering notes, and open-source explorations.https://vucense.com/en-ushttps://vucense.com/dev-corner/ai-agent-security-2026/https://vucense.com/dev-corner/ai-agent-security-2026/Secure agentic AI systems: prompt injection defence, tool permission scoping, human-in-the-loop approval gates, agent audit logging, and sandboxed code execution.Tue, 28 Apr 2026 12:00:00 GMTDev Cornerdivya-prakashhttps://vucense.com/dev-corner/caddy-reverse-proxy-2026/https://vucense.com/dev-corner/caddy-reverse-proxy-2026/Use Caddy as a sovereign reverse proxy with automatic TLS for Docker containers. Covers reverse_proxy directive, load balancing, health checks, and zero-config HTTPS.Tue, 28 Apr 2026 12:00:00 GMTDev Cornernoah-choihttps://vucense.com/dev-corner/caddy-setup-2026/https://vucense.com/dev-corner/caddy-setup-2026/Set up Caddy web server on Ubuntu 24.04 for automatic HTTPS with Let's Encrypt. Covers Caddyfile syntax, systemd service, reverse proxy, and first site configuration.Tue, 28 Apr 2026 12:00:00 GMTDev Cornernoah-choihttps://vucense.com/dev-corner/cicd-pipeline-design-2026/https://vucense.com/dev-corner/cicd-pipeline-design-2026/Design sovereign CI/CD pipelines: build/test/scan/deploy stages, caching strategies, parallelism, environment promotion, and pipeline security with OIDC token binding.Tue, 28 Apr 2026 12:00:00 GMTDev Cornersarah-jenkinshttps://vucense.com/dev-corner/container-vulnerability-scanning-2026/https://vucense.com/dev-corner/container-vulnerability-scanning-2026/Sovereign vulnerability management: CVE scanning with Trivy and Grype, SBOM generation with Syft, EPSS scoring, and automated patch workflows for container security.Tue, 28 Apr 2026 12:00:00 GMTDev Cornersarah-jenkinshttps://vucense.com/dev-corner/react-vite-frontend-2026/https://vucense.com/dev-corner/react-vite-frontend-2026/Build a production-ready React 19 app with Vite 6 on Ubuntu 24.04. Covers project setup, TypeScript, Tailwind CSS 4, React Router 7, API integration, testing with Vitest, and Docker deployment.Sat, 25 Apr 2026 09:00:00 GMTDev Corneranya-chenhttps://vucense.com/dev-corner/self-hosted-gitea-cicd-2026/https://vucense.com/dev-corner/self-hosted-gitea-cicd-2026/Run your own Git server with Gitea on Ubuntu 24.04 and build a full CI/CD pipeline using Gitea Actions. No GitHub. No cloud. Complete with Docker deployment, runner setup, and auto-deploy to production.Sat, 25 Apr 2026 08:00:00 GMTDev Cornersarah-jenkinshttps://vucense.com/dev-corner/postgresql-performance-tuning-2026/https://vucense.com/dev-corner/postgresql-performance-tuning-2026/Tune PostgreSQL 17 for production on Ubuntu 24.04. Covers shared_buffers, work_mem, autovacuum, query optimisation with EXPLAIN ANALYZE, HNSW pgvector tuning, connection pooling, and indexing strategies.Thu, 23 Apr 2026 14:00:00 GMTDev Cornernoah-choihttps://vucense.com/dev-corner/mariadb-mysql-replication-2026/https://vucense.com/dev-corner/mariadb-mysql-replication-2026/Configure MySQL 9 primary-replica replication on Ubuntu 24.04 LTS in 2026. Covers GTID replication, binary logging, replica setup, monitoring replication lag, promoting a replica, and failover patterns.Thu, 23 Apr 2026 13:00:00 GMTDev Cornernoah-choihttps://vucense.com/dev-corner/node-js-express-api-2026/https://vucense.com/dev-corner/node-js-express-api-2026/Build a production-ready REST API with Node.js 22 and Express 5 on Ubuntu 24.04 in 2026. Covers routing, middleware, JWT auth, PostgreSQL integration, input validation, error handling, and Docker deployment.Thu, 23 Apr 2026 10:00:00 GMTDev Cornerdivya-prakashhttps://vucense.com/dev-corner/python-for-devops-automation-2026/https://vucense.com/dev-corner/python-for-devops-automation-2026/Use Python for DevOps automation in 2026. Covers shell scripting with subprocess, file and log processing, REST API calls, SSH automation with Fabric, system monitoring, and Ansible alternatives.Thu, 23 Apr 2026 10:00:00 GMTDev Cornersarah-jenkinshttps://vucense.com/dev-corner/nginx-reverse-proxy-tutorial-2026/https://vucense.com/dev-corner/nginx-reverse-proxy-tutorial-2026/Configure Nginx as a reverse proxy on Ubuntu 24.04 LTS in 2026. Covers upstream blocks, SSL termination, load balancing, security headers, rate limiting, WebSocket proxying, and caching.Thu, 23 Apr 2026 09:00:00 GMTDev Cornernoah-choihttps://vucense.com/dev-corner/docker-security-best-practices-2026/https://vucense.com/dev-corner/docker-security-best-practices-2026/Harden Docker containers on Ubuntu 24.04 LTS. Non-root users, read-only filesystems, resource limits, image scanning with Trivy, secrets management, network isolation, and security benchmarks.Wed, 22 Apr 2026 23:00:00 GMTDev Cornersarah-jenkinshttps://vucense.com/dev-corner/langchain-langgraph-local-agents-python-2026/https://vucense.com/dev-corner/langchain-langgraph-local-agents-python-2026/Build local AI agents with LangChain 0.3 and LangGraph 0.2 running on Ollama in 2026. Covers chains, tools, memory, ReAct agents, multi-step workflows, and sovereign offline pipelines.Wed, 22 Apr 2026 13:00:00 GMTDev Cornerdivya-prakashhttps://vucense.com/dev-corner/fine-tuning-llm-qlora-unsloth-2026/https://vucense.com/dev-corner/fine-tuning-llm-qlora-unsloth-2026/Fine-tune large language models locally with QLoRA and Unsloth on Ubuntu 24.04 in 2026. Covers dataset preparation, LoRA configuration, training on RTX 4090, evaluation, GGUF export, and Ollama deployment.Wed, 22 Apr 2026 11:00:00 GMTDev Cornermarcus-thornehttps://vucense.com/dev-corner/linux-networking-basics-2026/https://vucense.com/dev-corner/linux-networking-basics-2026/Master Linux networking on Ubuntu 24.04. Covers ip command, ss for connections, UFW firewall, DNS resolution, network interfaces, static IPs, and systematic troubleshooting workflows.Wed, 22 Apr 2026 11:00:00 GMTDev Cornernoah-choihttps://vucense.com/dev-corner/apache-web-server-setup-2026/https://vucense.com/dev-corner/apache-web-server-setup-2026/Install and configure Apache 2.4 on Ubuntu 24.04 LTS in 2026. Covers virtual hosts, SSL with Let's Encrypt, .htaccess, security hardening, mod_rewrite, reverse proxy, and performance tuning.Tue, 21 Apr 2026 12:00:00 GMTDev Cornernoah-choihttps://vucense.com/dev-corner/cron-jobs-systemd-timers-ubuntu-2026/https://vucense.com/dev-corner/cron-jobs-systemd-timers-ubuntu-2026/Schedule tasks with cron and systemd timers on Ubuntu 24.04 LTS. Covers crontab syntax, user and system cron, systemd .timer units, anacron, logging, and migrating from cron to systemd timers.Tue, 21 Apr 2026 09:00:00 GMTDev Cornernoah-choihttps://vucense.com/dev-corner/bash-scripting-guide-ubuntu-2026/https://vucense.com/dev-corner/bash-scripting-guide-ubuntu-2026/Complete bash scripting guide for Ubuntu 24.04 LTS. Variables, arrays, conditionals, loops, functions, error handling, argument parsing, and real-world automation scripts. Fully tested with expected output.Tue, 21 Apr 2026 08:00:00 GMTDev Cornernoah-choihttps://vucense.com/dev-corner/docker-compose-tutorial-2026/https://vucense.com/dev-corner/docker-compose-tutorial-2026/Master Docker Compose v2 on Ubuntu 24.04. Covers services, networks, volumes, health checks, environment variables, production patterns, and Compose Watch for development. Fully tested.Tue, 21 Apr 2026 08:00:00 GMTDev Cornerdivya-prakashhttps://vucense.com/dev-corner/k3s-kubernetes-install-ubuntu-2026/https://vucense.com/dev-corner/k3s-kubernetes-install-ubuntu-2026/Install K3s on Ubuntu 24.04 LTS — the lightweight Kubernetes for home labs, edge, and small production clusters. Single-node and multi-node setup, Helm, Nginx ingress, and sovereign deployment.Fri, 17 Apr 2026 18:00:00 GMTDev Cornernoah-choihttps://vucense.com/dev-corner/mcp-protocol-build-server-python-2026/https://vucense.com/dev-corner/mcp-protocol-build-server-python-2026/Build a sovereign MCP server in Python with the official SDK. Expose tools, resources, and prompts to Claude Desktop, Cursor, and any MCP-compatible AI client. Tested with mcp 1.x.Fri, 17 Apr 2026 17:00:00 GMTDev Cornerdivya-prakashhttps://vucense.com/dev-corner/private-document-qa-pgvector-rag-2026/https://vucense.com/dev-corner/private-document-qa-pgvector-rag-2026/Build a fully local RAG pipeline in Python 2026. Ollama embeddings, pgvector 0.8 HNSW search, and Llama 4 Scout for document Q&A. No OpenAI. No cloud. Zero data leaves your machine.Fri, 17 Apr 2026 16:00:00 GMTDev Cornermarcus-thornehttps://vucense.com/dev-corner/llama-cpp-tutorial-run-gguf-models-2026/https://vucense.com/dev-corner/llama-cpp-tutorial-run-gguf-models-2026/Complete llama.cpp tutorial for 2026. Install, compile with CUDA/Metal, run GGUF models, tune all inference flags, use the API server, speculative decoding, and benchmark your hardware.Fri, 17 Apr 2026 15:00:00 GMTDev Cornermarcus-thornehttps://vucense.com/dev-corner/ssh-hardening-guide-2026/https://vucense.com/dev-corner/ssh-hardening-guide-2026/Complete SSH hardening for Ubuntu 24.04 LTS — Ed25519 keys, disable password auth, port knocking, 2FA with TOTP, fail2ban integration, and SSH certificate authorities. Fully tested.Fri, 17 Apr 2026 14:00:00 GMTDev Cornernoah-choihttps://vucense.com/dev-corner/build-rest-api-fastapi-python-2026/https://vucense.com/dev-corner/build-rest-api-fastapi-python-2026/Build a production REST API with FastAPI 0.115, PostgreSQL, Pydantic v2, JWT auth, and Docker. Full CRUD, async endpoints, OpenAPI docs, Alembic migrations, and sovereign deployment.Fri, 17 Apr 2026 13:00:00 GMTDev Cornerdivya-prakashhttps://vucense.com/dev-corner/linux-users-groups-management-2026/https://vucense.com/dev-corner/linux-users-groups-management-2026/Master Linux user and group management on Ubuntu 24.04. adduser, usermod, groupadd, su, sudo, /etc/passwd, /etc/shadow, SSH key provisioning, and service accounts. Fully tested.Fri, 17 Apr 2026 12:00:00 GMTDev Cornernoah-choihttps://vucense.com/dev-corner/how-to-install-ollama-run-llms-locally-2026/https://vucense.com/dev-corner/how-to-install-ollama-run-llms-locally-2026/Install Ollama 5.x on Ubuntu, macOS, and Windows. Pull and run Llama 4, Qwen3, Gemma 3, and Mistral locally. REST API setup, GPU acceleration, Open WebUI, and sovereign model management.Fri, 17 Apr 2026 11:00:00 GMTDev Cornermarcus-thornehttps://vucense.com/dev-corner/github-actions-tutorial-ci-cd-docker-python-2026/https://vucense.com/dev-corner/github-actions-tutorial-ci-cd-docker-python-2026/Build production CI/CD pipelines with GitHub Actions in 2026. Covers workflows, triggers, Docker builds, Python testing, secrets management, deployment to Ubuntu servers, and self-hosted runners.Fri, 17 Apr 2026 10:00:00 GMTDev Cornersarah-jenkinshttps://vucense.com/dev-corner/how-to-install-postgresql-17-on-ubuntu-24-04-2026/https://vucense.com/dev-corner/how-to-install-postgresql-17-on-ubuntu-24-04-2026/Install PostgreSQL 17 on Ubuntu 24.04 LTS with pgvector, pg_stat_statements, and production config. Covers users, databases, remote access, automated backups, and sovereign AI embeddings.Fri, 17 Apr 2026 09:00:00 GMTDev Cornernoah-choihttps://vucense.com/dev-corner/how-to-install-mysql-9-on-ubuntu-24-04-2026/https://vucense.com/dev-corner/how-to-install-mysql-9-on-ubuntu-24-04-2026/Install MySQL 9.0 on Ubuntu 24.04 LTS step-by-step. Covers secure installation, user creation, remote access, firewall config, performance tuning, and automated backups. Fully tested.Fri, 17 Apr 2026 08:00:00 GMTDev Cornernoah-choihttps://vucense.com/dev-corner/speculative-decoding-explained-2x-faster-local-llms-ollama-llama-cpp-2026/https://vucense.com/dev-corner/speculative-decoding-explained-2x-faster-local-llms-ollama-llama-cpp-2026/Speculative decoding doubles local LLM inference speed with zero quality loss. How it works, how to enable it in Ollama and llama.cpp today, and which model pairs give the best speedup.Thu, 16 Apr 2026 10:00:00 GMTDev Cornermarcus-thornehttps://vucense.com/dev-corner/gguf-quantization-explained-q4-k-m-vs-q8-0-vs-f16-2026/https://vucense.com/dev-corner/gguf-quantization-explained-q4-k-m-vs-q8-0-vs-f16-2026/Master GGUF quantization formats for local LLMs in 2026. Q2_K, Q4_K_M, Q5_K_S, Q8_0, F16 explained with benchmarks, VRAM tables, and exact Ollama and llama.cpp commands.Thu, 16 Apr 2026 09:00:00 GMTDev Cornermarcus-thornehttps://vucense.com/dev-corner/git-tutorial-beginners-complete-guide-branching-merging-2026/https://vucense.com/dev-corner/git-tutorial-beginners-complete-guide-branching-merging-2026/Master Git from zero to confident in 2026. Covers init, commit, branch, merge, rebase, remote repos, GitHub Flow, merge conflicts, stash, and self-hosted Git with Gitea. Fully tested.Wed, 15 Apr 2026 10:00:00 GMTDev Cornersarah-jenkinshttps://vucense.com/dev-corner/linux-file-permissions-chmod-chown-umask-guide-2026/https://vucense.com/dev-corner/linux-file-permissions-chmod-chown-umask-guide-2026/Master Linux file permissions with practical examples. chmod numeric & symbolic, chown, umask, SUID/SGID/sticky bit, ACLs, and real-world scenarios every developer hits. Ubuntu 24.04.Wed, 15 Apr 2026 09:00:00 GMTDev Cornernoah-choihttps://vucense.com/dev-corner/ubuntu-24-04-lts-server-setup-post-install-security-checklist-2026/https://vucense.com/dev-corner/ubuntu-24-04-lts-server-setup-post-install-security-checklist-2026/Complete Ubuntu 24.04 LTS server setup guide with 20 essential post-install steps. SSH hardening, UFW firewall, fail2ban, unattended-upgrades, swap, and sovereign server baseline. Fully tested.Tue, 14 Apr 2026 12:00:00 GMTDev Cornernoah-choihttps://vucense.com/dev-corner/how-to-install-nginx-on-ubuntu-24-04-lts-2026/https://vucense.com/dev-corner/how-to-install-nginx-on-ubuntu-24-04-lts-2026/Install and configure Nginx on Ubuntu 24.04 LTS step-by-step. Covers UFW firewall, server blocks, SSL with Let's Encrypt, security headers, and performance tuning. Fully tested.Tue, 14 Apr 2026 11:00:00 GMTDev Cornernoah-choihttps://vucense.com/dev-corner/how-to-install-docker-on-ubuntu-24-04-lts-2026/https://vucense.com/dev-corner/how-to-install-docker-on-ubuntu-24-04-lts-2026/Install Docker Engine 27.x on Ubuntu 24.04 LTS step-by-step. Covers Docker CE, Compose v2, rootless mode, GPU support, and first container. Fully tested. No Docker Desktop required.Tue, 14 Apr 2026 10:00:00 GMTDev Cornerdivya-prakashhttps://vucense.com/dev-corner/build-sovereign-local-ai-stack-ollama-open-webui-pgvector-2026/https://vucense.com/dev-corner/build-sovereign-local-ai-stack-ollama-open-webui-pgvector-2026/Deploy a complete local AI stack — Ollama 5.x, Open WebUI, and pgvector — on Ubuntu 24.04. Zero cloud. Zero API costs. Full commands, tested output, sovereignty verified.Sun, 12 Apr 2026 10:00:00 GMTDev Cornerdivya-prakashhttps://vucense.com/dev-corner/langchain-deepagents-sovereign-harness-2026/https://vucense.com/dev-corner/langchain-deepagents-sovereign-harness-2026/Build a high-autonomy agent using LangChain Deep Agents with planning, filesystem access, and subagent spawning. 100% local-first with MCP support.Fri, 20 Mar 2026 09:24:00 GMTDev Cornerdivya-prakashhttps://vucense.com/dev-corner/nvidia-free-ai-api-sovereign-llm-apps/https://vucense.com/dev-corner/nvidia-free-ai-api-sovereign-llm-apps/Get a free NVIDIA API key, access GLM-4.7, and build a working AI app in Python. No cloud lock-in. Full sovereign dev setup with Streamlit.Wed, 18 Mar 2026 09:00:00 GMTDev Cornermarcus-thornehttps://vucense.com/dev-corner/webgpu-acceleration-local-vision-language-models-lumina/https://vucense.com/dev-corner/webgpu-acceleration-local-vision-language-models-lumina/A deep dive into WebGPU acceleration and Transformers.js v3 for running Qwen 2-VL and Qwen 3.5 models locally in the browser with 100% privacy.Tue, 17 Mar 2026 11:12:21 GMTDev Corneranya-chen