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A leading IT operations community where professionals share and grow together.

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Latest from Ops Community

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Ops Community
Ops Community
Nov 9, 2025 · Operations

How to Achieve 99.99% Uptime with Keepalived Dual‑Node HA

This guide explains how to design a high‑availability architecture using Keepalived's VRRP‑based active‑passive failover, covering technical features, applicable scenarios, environment requirements, step‑by‑step installation and configuration for services like Nginx, MySQL and Redis, plus best practices, troubleshooting, monitoring and backup strategies.

VRRPhigh availabilitykeepalived
0 likes · 46 min read
How to Achieve 99.99% Uptime with Keepalived Dual‑Node HA
Ops Community
Ops Community
Nov 8, 2025 · Operations

Mastering Nginx Reverse Proxy & Load Balancing: Best Practices for High‑Performance Deployments

This comprehensive guide walks you through Nginx reverse proxy and load balancing fundamentals, key features, suitable scenarios, environment prerequisites, step‑by‑step installation, core configuration, performance tuning, security hardening, high‑availability designs, troubleshooting, monitoring, backup strategies, real‑world case studies, and advanced learning paths for production‑grade deployments.

Performance Optimizationhigh availabilitysecurity
0 likes · 56 min read
Mastering Nginx Reverse Proxy & Load Balancing: Best Practices for High‑Performance Deployments
Ops Community
Ops Community
Nov 6, 2025 · Big Data

Zero Data Loss Kafka Cluster Scaling: From 3 to 10 Nodes – A Complete Guide

This comprehensive guide walks you through expanding or shrinking a production‑grade Kafka cluster—covering prerequisites, anti‑pattern warnings, environment matrices, step‑by‑step expansion and contraction procedures, partition rebalancing principles, monitoring, best practices, and troubleshooting—to ensure zero data loss during scaling.

Big DataKafkaPartition Rebalancing
0 likes · 27 min read
Zero Data Loss Kafka Cluster Scaling: From 3 to 10 Nodes – A Complete Guide
Ops Community
Ops Community
Nov 5, 2025 · Databases

Mastering PostgreSQL Replication: Diagnose Lag, Split‑Brain, and Fix Common Issues

This comprehensive guide walks you through troubleshooting PostgreSQL physical (stream) replication, covering environment prerequisites, anti‑pattern warnings, step‑by‑step diagnostics for replication lag, split‑brain scenarios, replication slot problems, monitoring setup with Prometheus, and best‑practice recommendations to keep your primary‑standby cluster healthy.

PostgreSQLTroubleshootingWAL
0 likes · 35 min read
Mastering PostgreSQL Replication: Diagnose Lag, Split‑Brain, and Fix Common Issues
Ops Community
Ops Community
Nov 4, 2025 · Operations

149 Essential Shell Script Examples for Linux Sysadmins

This article introduces a free 68‑page collection of 149 practical Bash scripts covering common Linux tasks such as finding zombie processes, cleaning empty files, calculating statistics, formatting dates, checking file existence, sorting numbers, retrieving MAC addresses, and determining leap years, all with ready‑to‑copy code.

BashScriptingShell
0 likes · 8 min read
149 Essential Shell Script Examples for Linux Sysadmins
Ops Community
Ops Community
Nov 3, 2025 · Operations

Master Linux Memory Management: Core Commands & Tuning in 10 Minutes

This comprehensive guide walks you through Linux memory management fundamentals, from prerequisite environments and a quick checklist to step‑by‑step installation of monitoring tools, memory diagnostics, kernel parameter adjustments, THP and swap optimization, NUMA affinity tuning, validation, Prometheus alerts, security hardening, troubleshooting, rollback procedures, best‑practice recommendations, and ready‑to‑use scripts and configuration snippets.

LinuxMemory ManagementNUMA
0 likes · 24 min read
Master Linux Memory Management: Core Commands & Tuning in 10 Minutes
Ops Community
Ops Community
Nov 3, 2025 · Information Security

Why Wireshark Is Essential for Network Security Professionals

Wireshark, the open‑source packet analyzer formerly known as Ethereal, captures live network traffic on Windows and UNIX systems and is widely used for network management, security analysis, troubleshooting, and especially penetration testing, offering capabilities such as data capture, unencrypted information detection, attack behavior analysis, vulnerability discovery, and real‑time monitoring.

Packet CaptureWiresharknetwork analysis
0 likes · 2 min read
Why Wireshark Is Essential for Network Security Professionals
Ops Community
Ops Community
Nov 2, 2025 · Operations

Zero‑Downtime Nginx Log Rotation: Full Logrotate Automation & Compression Guide

Learn how to achieve zero‑downtime Nginx log rotation using Logrotate, covering prerequisites, environment matrix, step‑by‑step configuration, compression strategies, advanced slicing, automated cleanup, monitoring, performance tuning, remote archiving, security hardening, and troubleshooting to ensure continuous logging without service interruption.

LinuxLog ManagementZero Downtime
0 likes · 30 min read
Zero‑Downtime Nginx Log Rotation: Full Logrotate Automation & Compression Guide
Ops Community
Ops Community
Nov 1, 2025 · Operations

Deploy a Three‑Tier Chrony Time Sync Architecture with µs‑Level Monitoring

Learn how to set up Chrony for precise time synchronization across distributed systems by installing Chrony, configuring a three‑layer Stratum architecture, enabling hardware clock sync, protecting against clock jumps, and monitoring offsets with Prometheus and Node Exporter to achieve microsecond‑level accuracy.

MonitoringPrometheuschrony
0 likes · 30 min read
Deploy a Three‑Tier Chrony Time Sync Architecture with µs‑Level Monitoring