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Cloud Architecture
Cloud Architecture
Jul 14, 2026 · Operations

From Avalanche to Self‑Healing: Why Nginx 502 Spikes During High‑Traffic Sales and How to Fix It

During large‑scale promotions a sudden flood of Nginx 502 errors signals upstream interaction failures across proxy, kernel, application and orchestration layers, and the article explains the exact conditions, root causes, traffic amplification, and a systematic self‑healing approach to diagnose and eliminate them.

502NginxObservability
0 likes · 27 min read
From Avalanche to Self‑Healing: Why Nginx 502 Spikes During High‑Traffic Sales and How to Fix It
Raymond Ops
Raymond Ops
Jul 14, 2026 · Operations

Network Troubleshooting with tcpdump & Wireshark: Step‑by‑Step Guide and Ready‑to‑Use Scripts

This comprehensive guide walks you through using tcpdump and Wireshark for network fault isolation, covering core concepts, capture filters, detailed analysis techniques, performance tuning, expert information interpretation, automation scripts, and best‑practice recommendations for efficient packet‑level troubleshooting.

Linuxbash scriptsnetwork analysis
0 likes · 51 min read
Network Troubleshooting with tcpdump & Wireshark: Step‑by‑Step Guide and Ready‑to‑Use Scripts
Ops Community
Ops Community
Jul 14, 2026 · Operations

Practical grep, awk, and sed use cases for daily operations

This article walks through the most common grep, awk, and sed scenarios that sysadmins face—searching logs, extracting context, counting errors, batch‑editing files, and performing field‑based statistics—while explaining core options, pitfalls, and best‑practice workflow recommendations.

Linuxawkgrep
0 likes · 25 min read
Practical grep, awk, and sed use cases for daily operations
Golang Shines
Golang Shines
Jul 14, 2026 · Operations

Why Does OOM Occur Even When Server Memory Looks Sufficient?

The article explains that out‑of‑memory (OOM) events can happen despite apparent free memory because OOM can be triggered by cgroup limits, NUMA constraints, kernel allocation failures, or systemd‑oomd policies, and it provides a step‑by‑step diagnostic method covering logs, metrics, and Kubernetes specifics.

LinuxOOMcgroup
0 likes · 27 min read
Why Does OOM Occur Even When Server Memory Looks Sufficient?
ThinkingAgent
ThinkingAgent
Jul 14, 2026 · Operations

Why AI Agents Need Observability: Tracing, Monitoring, and SRE in the L8 Layer

A recent fintech chatbot failure exposed how missing tracing, cost attribution, and proper alerting can turn a three‑day incident into a three‑day investigation, prompting a detailed guide on the L8 observability layer that defines three pillars—Tracing, Metrics, Logs—and outlines best‑practice tooling, standards, and implementation steps for AI production systems.

AI observabilityCost attributionLangfuse
0 likes · 36 min read
Why AI Agents Need Observability: Tracing, Monitoring, and SRE in the L8 Layer
Efficient Ops
Efficient Ops
Jul 13, 2026 · Operations

Open‑Source Nginx UI: A Visual Tool That Can Triple Ops Efficiency

Nginx UI offers a graphical interface for configuring and monitoring Nginx, includes real‑time metrics, extensible modules and AI Agent integration, and provides multiple installation options such as systemd, Docker and a one‑click script, promising up to three‑fold productivity gains for operators.

AI AgentDockerNginx
0 likes · 5 min read
Open‑Source Nginx UI: A Visual Tool That Can Triple Ops Efficiency
Raymond Ops
Raymond Ops
Jul 13, 2026 · Operations

Scaling Prometheus to Thousands of Nodes with Thanos: Architecture, Storage, and HA Practices

The article analyzes the storage, query performance, high‑availability, and data‑loss challenges of running Prometheus on a 1,000‑node Kubernetes cluster and demonstrates how a Thanos‑based architecture—Sidecar, Query, Store Gateway, Compactor, Receiver, and object‑storage back‑ends—can be designed, tuned, and operated to achieve horizontal scalability, efficient down‑sampling, and reliable fault recovery.

Object StoragePrometheusScaling
0 likes · 35 min read
Scaling Prometheus to Thousands of Nodes with Thanos: Architecture, Storage, and HA Practices
Raymond Ops
Raymond Ops
Jul 13, 2026 · Operations

Systematic Root‑Cause Analysis for NFS Mount Failures

This guide presents a systematic, layer‑by‑layer methodology for diagnosing and resolving NFS share mount failures, covering version differences, architecture layers, key daemons, RPC mechanisms, common error messages, detailed server and client checks, firewall and SELinux considerations, performance tuning, high‑availability setups, and monitoring.

KerberosLinuxNFS
0 likes · 50 min read
Systematic Root‑Cause Analysis for NFS Mount Failures
MaGe Linux Operations
MaGe Linux Operations
Jul 13, 2026 · Operations

Can You Recover Files After an rm -rf Mistake? What Works and What Doesn’t

The article explains that while some data deleted with rm -rf can be recovered, no command guarantees full restoration; it outlines a step‑by‑step process for Linux production environments, from stopping writes and gathering evidence to using backups, snapshots, open‑file extraction, block‑level imaging, and verification.

BackupLinuxfile recovery
0 likes · 34 min read
Can You Recover Files After an rm -rf Mistake? What Works and What Doesn’t
Ops Community
Ops Community
Jul 13, 2026 · Operations

How to Diagnose a Suddenly Lagging Linux Server: Step‑by‑Step Ops Checklist

This guide walks you through a systematic, read‑only diagnostic workflow for a Linux server that becomes unresponsive, covering initial symptom clarification, data collection, CPU, memory, disk, network, application, container, and post‑mortem analysis, with concrete commands and evidence‑based decision points.

LinuxPerformanceServer
0 likes · 37 min read
How to Diagnose a Suddenly Lagging Linux Server: Step‑by‑Step Ops Checklist
Java Tech Enthusiast
Java Tech Enthusiast
Jul 13, 2026 · Operations

Massive Windows 11 Bug Can Eat Up to 70 GB of C: What’s Happening and How to Fix It

A Windows 11 bug in the Capability Access Manager service can cause the file CapabilityAccessManager.db‑wal to balloon to dozens or even hundreds of gigabytes, filling the C: drive; Microsoft has acknowledged the issue, released KB5095093 to fix it, and users can also delete the file in safe mode as a workaround.

Capability Access ManagerKB5095093Windows 11
0 likes · 4 min read
Massive Windows 11 Bug Can Eat Up to 70 GB of C: What’s Happening and How to Fix It
DataFunTalk
DataFunTalk
Jul 13, 2026 · Operations

How to Stop GPT‑5.6 Sol from Deleting Your Files with a Simple Hook

A recent tweet from former HyperWrite CEO Matt Shumer revealed that GPT‑5.6 Sol’s Ultra mode can mistakenly execute a dangerous rm‑rf command, wiping almost all files on a Mac, and the article shows how to configure Kimi‑Code hooks on macOS, Linux, and Windows to block such commands and protect your data.

AI agent safetyDevOpsGPT-5.6
0 likes · 6 min read
How to Stop GPT‑5.6 Sol from Deleting Your Files with a Simple Hook
Efficient Ops
Efficient Ops
Jul 12, 2026 · Operations

How China Telecom’s Dual Systems Earned SRE Level‑3 Certification and Elevated SOMM Operations

China Telecom’s production‑grade CPCP and enterprise‑marketing systems successfully passed the CAICT SRE Level‑3 assessment, achieving over 99.9% annual availability, zero incidents, and significant improvements in observability, chaos engineering, automation, and capacity planning, as detailed in an interview with senior IT managers.

AIOpsChina TelecomDevOps
0 likes · 14 min read
How China Telecom’s Dual Systems Earned SRE Level‑3 Certification and Elevated SOMM Operations
Raymond Ops
Raymond Ops
Jul 12, 2026 · Operations

Essential Port Connectivity Troubleshooting: A Complete Step‑by‑Step Guide

This guide walks you through a systematic, seven‑layer approach to diagnosing port connectivity failures on Linux systems, covering service listening checks, local firewall rules, SELinux policies, network path analysis, cloud security groups, and application‑level protocols, with concrete commands, scripts, case studies, best‑practice recommendations, and monitoring tips.

LinuxNmapSELinux
0 likes · 40 min read
Essential Port Connectivity Troubleshooting: A Complete Step‑by‑Step Guide
IT Services Circle
IT Services Circle
Jul 12, 2026 · Operations

Why Facebook and Google Abandoned Git for Custom Version‑Control Systems

The article traces how a 2005 BitKeeper licensing dispute sparked the creation of Git, how Facebook’s massive monorepo crippled Git’s performance and led it to adopt and heavily extend Mercurial into Sapling, and how Google’s even larger codebase forced a clean‑room rebuild of a new VCS called Piper.

FacebookGoogleMercurial
0 likes · 10 min read
Why Facebook and Google Abandoned Git for Custom Version‑Control Systems
ITPUB
ITPUB
Jul 12, 2026 · Operations

How to Diagnose and Fix Online Service Failures: A Step‑by‑Step Checklist

This guide walks through a systematic troubleshooting checklist for online service incidents, covering CPU, disk, memory, GC, and network problems, and demonstrates how to use Linux tools such as ps, top, jstack, jmap, vmstat, iostat, netstat, ss, and tcpdump to pinpoint root causes.

CPUDiskGC
0 likes · 22 min read
How to Diagnose and Fix Online Service Failures: A Step‑by‑Step Checklist
Golang Shines
Golang Shines
Jul 12, 2026 · Operations

10 Essential Linux Ops Tools Every Engineer Should Master

This article introduces ten widely used Linux operations tools—Shell scripts, Git, Ansible, Prometheus, Grafana, Docker, Kubernetes, Nginx, ELK Stack, and Zabbix—detailing their functions, typical scenarios, advantages, concrete usage examples, and links to learning resources for each.

AnsibleDockerGrafana
0 likes · 9 min read
10 Essential Linux Ops Tools Every Engineer Should Master
MaGe Linux Operations
MaGe Linux Operations
Jul 12, 2026 · Operations

Why Does OOM Occur Even When Server Memory Looks Sufficient?

Even when monitoring shows free memory, Linux can still kill processes due to various OOM paths such as cgroup limits, NUMA allocation failures, kernel high-order allocation issues, or systemd‑oomd, and this guide walks through a reproducible investigation and remediation process.

LinuxOOMcgroup
0 likes · 29 min read
Why Does OOM Occur Even When Server Memory Looks Sufficient?
MaGe Linux Operations
MaGe Linux Operations
Jul 12, 2026 · Operations

10 Essential Linux Commands to Quickly Diagnose 80% of Production Issues

This guide presents a systematic, ten‑step Linux command workflow—from overall system health to process, I/O, and log analysis—helping operators quickly determine whether a problem persists, which resource (CPU, memory, disk, network) is affected, and whether enough evidence exists to safely remediate.

LinuxShell Commandsperformance monitoring
0 likes · 24 min read
10 Essential Linux Commands to Quickly Diagnose 80% of Production Issues