AI agent applications, installation, large-model testing, computer fundamentals, IT operations and maintenance exchange, network technology exchange, Linux learning
This article walks through converting monolithic Ansible playbooks into modular roles, securing secrets with Vault, boosting concurrency for hundreds of servers, and delivering ready‑to‑run LNMP, LVS + Keepalived, system‑info, NTP, and bare‑metal initialization playbooks, complete with code examples and performance tips.
This article walks you through the twenty most frequently used Ansible modules, explaining their purpose, key parameters, real‑world examples, common mistakes, and best‑practice recommendations so you can automate tasks reliably and avoid typical pitfalls.
This article walks through Ansible’s three core components—ansible.cfg settings, inventory definitions (including INI, YAML, and dynamic scripts), and Playbook structure—showing practical examples, performance tweaks, variable hierarchies, conditionals, loops, handlers, tags, blocks, roles, and common pitfalls to help you manage hundreds of servers efficiently.
This guide compiles ten high‑frequency interview questions on TCP and UDP, covering core concepts, handshake mechanics, reliability features, congestion control, packet framing issues, SYN‑Flood attacks, and essential Linux commands for inspecting and troubleshooting connections.
The article compares four major configuration‑management tools, explains why Ansible’s zero‑agent, YAML‑based, push model makes it ideal for most ops teams, and provides step‑by‑step installation, inventory setup, connectivity testing, and practical playbook examples for batch software deployment and updates.
This article explains load balancing fundamentals, compares hardware appliances with the Linux Virtual Server (LVS) solution, details NAT, DR, and TUN modes, and provides step‑by‑step ipvsadm commands, Keepalived high‑availability configuration, kernel tuning, and troubleshooting for production environments.
This guide walks through installing Nginx via package manager or source compilation, explains core roles, provides a production‑ready configuration template, and details reverse proxy, load‑balancing strategies, health checks, high‑concurrency tuning, and HTTPS setup with self‑signed and Let’s Encrypt certificates.
This article explains DNS fundamentals, the full query flow, record types, Linux client configuration files, compares BIND9, Dnsmasq, CoreDNS and Unbound, and provides step‑by‑step hands‑on setups for each server with concrete commands and configuration examples.
This practical guide walks ops engineers through installing, configuring PATH, setting language‑specific environment variables, and managing versions for 20 major programming languages, illustrating common pitfalls with real‑world examples and offering concrete best‑practice rules to keep production systems stable.
This article systematically reviews 14 open‑source server‑monitoring solutions, explains the three monitoring layers, dives deep into Prometheus + Alertmanager and Zabbix, compares architectures, performance, and costs, and provides a practical decision‑making guide with real‑world scenarios and pitfalls.
