Posted inSecurity
Hunting Leaked Secrets: Using TruffleHog to Secure Your Git History
Accidentally committed an API key? Learn how to use TruffleHog to scan your Git history, verify if secrets are still active, and remove them permanently.
Posted inSecurity
Automating SSL/TLS Certificate Lifecycle Management with cert-manager on Kubernetes
Manual SSL certificate management fails at scale — expiry dates get missed, secrets fall out of sync, and incidents happen over weekends. This guide walks through setting up cert-manager on Kubernetes to automate certificate issuance and renewal from both Let's Encrypt and a private internal CA, so you never chase an expiry date again.
Posted inLinux
How I Cut My Linux Server Boot Time in Half Using systemd-analyze
After six months of running a slow-booting Ubuntu 22.04 production server, I used systemd-analyze to trace a 40-second boot time down to three root causes and fixed them. Here is the full process, from reading the blame output to choosing between disabling, masking, or delaying services.
Posted inLinux
Fixing ‘Too many open files’ on Linux: A Guide to File Descriptors and ulimit
Tired of 'Too many open files' errors? This guide explains how to properly configure Linux File Descriptors using ulimit, limits.conf, and systemd overrides for high-performance servers.
Posted inAI
High-Performance LLM Inference: Scaling vLLM and Docker for Production
Boost your AI performance with vLLM and Docker. Learn to use PagedAttention, Tensor Parallelism, and quantization to scale LLMs for hundreds of concurrent users.
Posted inProgramming
Python Background Tasks: A Production-Ready Guide to Celery and Redis
Offload heavy processing and prevent server crashes. This production guide covers implementing Celery and Redis for asynchronous tasks, retries, and scheduled jobs in Python.
Posted inHomeLab
Stop Renting Your Security: Self-Host Vaultwarden on Docker
Tired of cloud breaches and monthly fees? Learn how to host your own lightweight, secure password vault using Vaultwarden and Docker in under 10 minutes.
Posted inNetworking
Beyond Telnet: Mastering Netcat and Socat for Linux Network Triage
Master Netcat and Socat for precise Linux network debugging. This guide provides practical examples for port scanning, 100MB/s+ file transfers, and secure SSL relays.
Posted inLinux
Joining Linux to Active Directory: A No-Nonsense Guide to SSSD and Realmd
Learn how to integrate Linux servers into an Active Directory domain using SSSD and Realmd. This guide covers installation, domain joining, and advanced configurations like sudo permissions and group-based access control.
Posted inDatabase
PostgreSQL JSONB: Schema Flexibility Without the NoSQL Headache
PostgreSQL JSONB offers the best of both worlds: relational integrity and NoSQL flexibility. Learn how to implement it, index it for speed, and avoid common production pitfalls.