This article presents a curated list of 18 command‑line tools for Linux/Unix administrators, explaining how each utility—such as top, vmstat, lsof, tcpdump, and Nagios—helps monitor system performance, diagnose issues, and maintain reliable server operations.
This guide walks through the complete installation of Oracle Enterprise Manager Grid Control 11g on Red Hat 6.4, detailing the required software packages, configuration parameters, and step‑by‑step solutions to more than a dozen encountered errors—from missing 32‑bit libraries to hostname validation, file‑descriptor limits, and agent cleanup.
This tutorial explains how to reset and set MySQL root passwords, manage user privileges with grant and revoke commands, perform logical backups and restores using mysqldump, and deploy phpMyAdmin on a LAMP stack for web‑based database administration.
This article introduces Vipshop’s VTP (VIP Test Platform), detailing its architecture, fine‑grained TestNG support, integration with Jenkins, CI and QAMP, and the platform’s features for scheduling, reporting, and future scalability in a rapidly growing e‑commerce environment.
The article outlines a comprehensive O2O data quality assurance workflow for online movie seat selection, detailing background challenges, a three‑stage process, evaluation metrics, and a concrete case study that demonstrates how real‑time data monitoring and issue handling improve user experience.
This article explains the difference between unreliable (1‑31) and reliable real‑time (32‑64) Linux signals, demonstrates the behavior with two C programs, and reveals the kernel data structures and limits that govern signal queuing and delivery.
This article explains how to use Android Studio’s Allocation Tracker, automate its start/stop via code using the ddmlib library, and directly access Dalvik’s internal allocation records to retrieve object size, type, and stack information with minimal performance impact, while discussing limitations and compatibility concerns.
This tutorial shows how to install json-server, create a db.json file, run the mock REST API, and perform GET and POST requests to simulate backend data, enabling front‑end developers to work without waiting for a real server.
This guide explains how to create and use Android plugins in Unity, detailing wrapper placement, bidirectional calls between Unity’s Mono/IL2CPP and Android’s Dalvik/ART, reflection‑based interface design, Gradle‑MSBuild hybrid project setup, ADB remote debugging, and support for AAR files and manifest configuration.
This article explains what JavaScript function throttling is, why it improves performance for high‑frequency events like scroll or resize, and provides step‑by‑step code examples—including basic and advanced implementations—to control execution timing and avoid excessive DOM or network calls.
The article reviews Hadoop’s origins from Google’s pioneering papers, explains its architecture and ecosystem, evaluates its strengths such as scalability and benchmarks, discusses current limitations like single‑point failures and complex programming, and outlines upcoming improvements including HDFS Federation and next‑generation MapReduce.
This article introduces DevOps fundamentals, explains Docker's role and core components, outlines the advantages of containerizing DevOps pipelines, and shares a practical Rancher‑based implementation with detailed workflow, environment setup, and Q&A insights for modern software delivery.
The fifth‑year DevOps report, based on surveys of over 4,600 global professionals, shows how high‑performing organizations achieve dramatically faster deployments, higher employee loyalty, better quality and security, and substantial cost savings, while highlighting the ROI of DevOps investments and cultural transformation.
The article explains how a company is retiring Oracle due to cost and scalability, outlines a staged move to NoSQL and cloud storage, argues that SQL remains vital, and shares practical examples of Spark SQL rewrites and JDBC‑based Hive integration.
This article introduces the core concepts of building a cloud‑native microservice platform with Spring Cloud and Docker, covering configuration management, service discovery, circuit breakers, API gateways, mixed persistence, and provides a step‑by‑step guide to clone, build, and run the example project.
This guide explains essential Linux audit commands, log‑viewing techniques, user and process inspection methods, and additional checks such as file integrity, network monitoring, cron jobs, and backdoor detection, providing a comprehensive toolkit for system security and operations.
In this talk, Ctrip’s R&D Director Wu Yiting shares how the company’s continuous delivery platform evolved through large‑scale platform launches, major reforms, and the aftermath of the 528 incident, highlighting improvements in security, availability, scalability, and container‑based delivery practices.
The article examines Oracle's gradual abandonment of Java EE, detailing how funding cuts, internal re‑assignments, and legal battles have stalled development, sparked community backlash, and raised concerns about the future of enterprise Java and its ecosystem.
The article explains microservice architecture as a lightweight, service‑oriented approach where each service performs a single, well‑defined function, runs in its own process with an independent database, can be deployed separately on various platforms, and communicates via HTTP or other lightweight protocols, highlighting its key characteristics and benefits.
Xiaomi senior R&D engineer Deng Wenjun shares the evolution of Xiaomi's internet‑finance risk‑control system, describing early rule‑based limits, the adoption of Drools for fast rule deployment, data‑driven modeling with random‑forest classifiers, and ongoing challenges in scalability, latency, and privacy.
