An operations lab passionate about server tinkering 🔬 Sharing automation scripts, high-availability architecture, alert optimization, and incident reviews. Using technology to reduce overtime and experience to avoid major pitfalls. Follow me for easier, more reliable operations!
This guide explains why MySQL backup verification is essential, outlines three pre‑restore checks, provides a step‑by‑step manual recovery procedure for single databases, and introduces a production‑grade Bash script that automates one‑click restoration with safety prompts and logging.
This guide walks you through why Firewalld is the preferred firewall on CentOS 7+, explains its core concepts, shows step‑by‑step installation, zone management, service and port configuration, and demonstrates how to integrate ipset for efficient bulk IP handling, including pitfalls and best practices.
This guide presents a fully automated MySQL backup script that securely filters system databases, compresses backups with gzip, logs each operation, automatically removes expired files, and includes step‑by‑step configuration, deployment, scheduling, troubleshooting, and optimization tips for production environments.
This guide introduces websocat, a Rust‑based command‑line utility for WebSocket, covering installation via package managers or source, basic echo testing, setting up local servers, bidirectional TCP‑WebSocket proxying, secure connections, performance tuning, and integration with systemd and Nginx.
This guide explains the differences between Server‑Sent Events and WebSocket, shows when to choose each technology, and provides step‑by‑step Nginx configuration snippets—including global mapping, SSE and WebSocket location blocks, troubleshooting tips, and a minimal debug setup—to ensure reliable real‑time communication in production.
This guide explains what NPS (Network Penetration Service) is, why it’s needed, its core advantages, and provides step‑by‑step instructions for deploying the server and client on Linux, Windows, or Docker, configuring TLS, managing tunnels, and troubleshooting common issues.
After upgrading to recent Linux distributions, SecureCRT often cannot establish SSH connections due to disabled legacy algorithms, but the issue can be resolved by updating SecureCRT or manually enabling modern key‑exchange and host‑key types in its settings.
This tutorial walks you through installing a private, secure Harbor 2.14.1 container registry on Linux, covering system prerequisites, Docker setup, offline installer download, detailed harbor.yml configuration, firewall adjustments, optional self‑signed certificates, installation scripts, verification, image push testing, common admin commands, production best practices, and troubleshooting tips.
When logging into a new MySQL 8.4 instance with a non‑existent user, one login attempt yields a "Plugin 'mysql_native_password' is not loaded" error while another returns the usual "Access denied", a difference caused by MySQL's hidden decoy‑user mechanism that randomizes authentication plugins for nonexistent accounts.
This guide shows how to install and configure Termux on an Android device to create a full‑featured Linux development environment, covering package sources, essential tools, Git workflow, Python, Jupyter, SSH, editors, Termux:API, Zsh, tmux, and common troubleshooting steps.
