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Configuring Keepalived on Ubuntu Server: Setting Up Virtual IP and High Availability for Web Server Clusters

By IT From Zero October 11, 2026

Set up High Availability for web server clusters on Ubuntu using Keepalived and Virtual IP (VIP). Eliminate single points of failure with sub-second failover.

MySQL

Advanced MySQL 8 Security: Mastering Roles (RBAC) and Practical Caching_sha2_password

By IT From Zero October 11, 2026

Take full advantage of Roles (RBAC) and the caching_sha2_password mechanism in MySQL 8. Discover essential configuration tips for clean, secure production user management.

Git

Setting Up Gitleaks: Prevent API Key and Password Leaks from Git Hooks to CI/CD Pipelines

By IT From Zero October 11, 2026

A hands-on guide to configuring Gitleaks: Prevent leaked tokens, passwords, and API keys with Git pre-commit hooks and GitHub Actions CI/CD pipelines.

Artificial Intelligence tutorial - IT technology blog

Getting Started with Letta (MemGPT) in Python: Build AI Agents with Self-Managing Long-Term Memory

By IT From Zero October 11, 2026

Struggling with context window overflow during extended conversations? Learn how to use Letta (MemGPT) with Python to build AI agents with self-updating tiered memory.

Fedora

Installing Grafana Loki and Promtail on Fedora Server: Centralized Logging, Way Lighter than ELK

By IT From Zero October 11, 2026

A hands-on production guide to deploying Grafana Loki and Promtail on Fedora Server for centralized logging. Highly resource-efficient compared to ELK, using under 400MB of RAM.

Network

Linux Conntrack Guide: Monitor, Troubleshoot, and Tune the Connection Tracking Table

By IT From Zero October 11, 2026

Learn how to resolve Linux conntrack table exhaustion, troubleshoot packet drops using dmesg, and fine-tune sysctl and hashsize settings for high-traffic workloads.

Git

A Guide to git push –force-with-lease: The Safer Force Push to Avoid Overwriting Teammates’ Code

By IT From Zero October 10, 2026

git push --force-with-lease is a safe alternative to standard git push --force. It checks the remote branch status before overwriting, eliminating the risk of accidentally deleting your teammates' commits.

Git

A Guide to git merge-base: Finding the Common Ancestor Commit for Accurate Diffing in CI/CD

By IT From Zero October 10, 2026

A deep dive into using git merge-base to find the common ancestor commit between branches, accurately filtering changed files and optimizing test runtimes in CI/CD pipelines.

Ubuntu

Ubuntu Server Security Auditing with Lynis: Vulnerability Scanning and Practical Hardening

By IT From Zero October 10, 2026

A hands-on guide to installing Lynis on Ubuntu Server, analyzing Hardening Index reports, fixing common security flaws, and automating audits via cron.

Git

Keyless Git Commit Signing with Gitsign and Sigstore: Modern Identity Verification

By IT From Zero October 10, 2026

Sign Git commits without GPG keys using Gitsign and Sigstore. Learn how to configure keyless signing via GitHub or Google OIDC to protect repos from identity spoofing.

Building Your Own MCP Server with TypeScript: Connect AI Assistants to Internal Systems

Mastering TanStack Query v5 in React: Practical Server State Management, Caching, and Optimistic Updates

Installing ModSecurity v3 and OWASP CRS on Nginx Ubuntu: Building a Production-Ready Web Server WAF

Centralized Cloudflare Traffic and Security Monitoring with Cloudflare Exporter, Prometheus, and Grafana

Guide to E2B Code Interpreter with Python: Building a Secure Sandbox for AI Agents

A Guide to bpftrace and BCC on Fedora: Linux Performance Analysis and Diagnostics with eBPF

Optimizing Index Merge in MySQL: Understanding Intersection, Union, and Handling Optimizer Missteps

How to Create Systemd Services and Systemd Timers on Ubuntu: A Robust Crontab Alternative

Configuring the FEDERATED Storage Engine in MySQL: Connect and Query Remote Tables

SGLang on Linux Guide: Accelerate LLM Inference and Optimize RadixAttention for AI APIs

Configuring Keepalived on Ubuntu Server: Setting Up Virtual IP and High Availability for Web Server Clusters

Advanced MySQL 8 Security: Mastering Roles (RBAC) and Practical Caching_sha2_password

Setting Up Gitleaks: Prevent API Key and Password Leaks from Git Hooks to CI/CD Pipelines

Getting Started with Letta (MemGPT) in Python: Build AI Agents with Self-Managing Long-Term Memory

Installing Grafana Loki and Promtail on Fedora Server: Centralized Logging, Way Lighter than ELK

Linux Conntrack Guide: Monitor, Troubleshoot, and Tune the Connection Tracking Table

A Guide to git push –force-with-lease: The Safer Force Push to Avoid Overwriting Teammates’ Code

A Guide to git merge-base: Finding the Common Ancestor Commit for Accurate Diffing in CI/CD

Ubuntu Server Security Auditing with Lynis: Vulnerability Scanning and Practical Hardening

Keyless Git Commit Signing with Gitsign and Sigstore: Modern Identity Verification