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

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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.

PostgreSQLReplicationWAL
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.

Scriptingbashshell
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.

LinuxNUMASwap
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.

Penetration TestingWiresharknetwork 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.

LinuxNginxlog management
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.

chronymonitoringprometheus
0 likes · 30 min read
Deploy a Three‑Tier Chrony Time Sync Architecture with µs‑Level Monitoring
Ops Community
Ops Community
Oct 30, 2025 · Databases

Zero Data Loss with Redis RDB+AOF Hybrid Persistence: A Practical Guide

This comprehensive guide walks you through configuring Redis RDB+AOF hybrid persistence for zero data loss, covering prerequisites, environment matrix, checklist, step‑by‑step implementation, kernel tuning, monitoring, performance testing, security hardening, common issues, rollback procedures, and best practices.

AOFHybridLinux
0 likes · 33 min read
Zero Data Loss with Redis RDB+AOF Hybrid Persistence: A Practical Guide
Ops Community
Ops Community
Oct 29, 2025 · Cloud Native

ELK vs Loki: Which Kubernetes Log Solution Saves Cost and Boosts Performance?

This article compares ELK and Loki for Kubernetes log collection, covering scenarios, prerequisites, architectural differences, storage costs, query performance, deployment steps with Helm, best‑practice optimizations, and troubleshooting tips to help you choose the most efficient solution.

Cloud NativeELKKubernetes
0 likes · 12 min read
ELK vs Loki: Which Kubernetes Log Solution Saves Cost and Boosts Performance?
Ops Community
Ops Community
Oct 28, 2025 · Operations

Master Linux Performance: Top, iotop, pidstat, sar – Real‑World Diagnostic Guide

This guide covers Linux performance analysis tools—including top, htop, iotop, pidstat, iostat, sar, and vmstat—detailing installation, usage, key metrics, troubleshooting scenarios, monitoring integration with Prometheus, and best‑practice recommendations for effective system diagnostics and capacity planning.

iotopopsperformance monitoring
0 likes · 29 min read
Master Linux Performance: Top, iotop, pidstat, sar – Real‑World Diagnostic Guide