Learn how to systematically examine a Linux host for compromise by checking logs, user accounts, processes, file integrity, network activity, scheduled tasks, services, and rootkits, using built‑in commands and RPM verification to uncover hidden threats.
This guide explains the remote monitoring principle of Nagios using NRPE, then walks through installing Nagios‑plugins and NRPE on both the monitored host and the Nagios server, configuring host and service definitions, and verifying communication through the web interface.
This article explains how to effectively implement asynchronous callback methods in Node.js C++ addons, covering V8 version compatibility, data type conversion challenges, and leveraging the NAN library to simplify development while also providing useful reference links for further reading.
This discussion post examines whether code should be commented, citing the book *Refactoring* and emphasizing that needing comments often signals the need for refactoring, while good variable names can serve as implicit documentation, and stresses the importance of clear interface comments.
Discover how 360’s private cloud platform leverages SaltStack’s Syndic architecture and a Redis Pub/Sub bridge to efficiently manage and execute commands across tens of thousands of servers, addressing multi‑datacenter challenges, reducing message loss, and improving automation performance.
The article examines Android power consumption by analyzing the BatteryStatsHelper source code, explains how CPU, wakelock, Wi‑Fi, mobile data and sensor usage contribute to energy drain, and demonstrates practical measurement techniques using adb commands, dumpsys batterystats, and third‑party tools such as PowerTutor and BetterBatteryStats.
Discover ten amusing Linux command‑line tools, complete with installation steps and example outputs, that transform a regular terminal into a visual playground ranging from falling code rain to animated cats, cows, and even a virtual aquarium.
The article explains how the Linux kernel identifies processes stuck in the uninterruptible D state, describes the hung‑task detection code, shows the watchdog thread and related functions, and provides a Raspberry Pi example that triggers and logs a hung‑task warning.
To meet a demanding monitoring project that required storing up to 400 million records per day in SQL Server 2012, the author details a step‑by‑step journey involving bulk‑copy insertion, removing indexes during load, hourly partitioned tables, strategic index creation, and query optimizations to achieve sub‑second query times.
The article examines SoftBank’s £23.4 billion cash offer for ARM, exploring Masayoshi Son’s entrepreneurial mindset, the strategic reasons behind the deal, its implications for the Internet of Things, the broader semiconductor industry, and how competitors might respond to this transformative acquisition.
This article explains how to use Node.js C++ Addons and the V8 API to define, convert, and transfer JavaScript primitive and complex types to C++ and back, covering type inheritance, immutability, argument handling, and the role of NAN for version stability.
Over the past two years WhatsApp has dramatically expanded its user base, hardware, and traffic while maintaining a tiny engineering team, highlighting the challenges of massive scalability, Erlang‑based distributed design, Mnesia database bottlenecks, decoupling strategies, and operational patches required to keep the service reliable.
The article reviews ACL 2016’s tutorial program, summarizing key talks on computer‑aided translation, neural machine translation, semantic sense representation, short‑text understanding, and highlights selected papers on multimodal translation, coverage modeling, and language‑vision grounding, illustrating deep learning’s impact on NLP research.
This article compiles essential frontend interview questions, key knowledge areas, and detailed explanations covering HTML, CSS, JavaScript, browser engines, storage APIs, and best practices, helping beginners build a solid foundation and prepare effectively for technical interviews.
The article explains why a Huawei AR2240 gateway using PPPoE on an on‑demand dial‑bundle fails to obtain an IP address, identifies the misconfiguration of the internal Ethernet interface, and provides step‑by‑step commands to switch the PPPoE mode to permanent online for successful dialing.
In this talk, Quora’s VP of Engineering Xavier Amatriain shares practical lessons from building the company’s large‑scale recommender system, covering data richness, implicit signals, model choices, feature engineering, evaluation strategies, and why distribution isn’t always required.
This article explains how Baidu Maps’ reverse‑geocoding service converts coordinates into addresses using point, line, and polygon data mapped onto a grid index, describes the incremental indexing mechanism that enables rapid data updates, and highlights the system’s high availability and performance characteristics.
This article explains why Node.js applications can suffer memory leaks due to V8 garbage‑collection limits, describes V8 memory regions and GC types, and provides practical commands, monitoring tools, and a reproducible code example to identify and resolve leaks.
This article explains how to design a robust, zero‑intrusion data fallback component for high‑traffic web services using Nginx, Lua, and AOP principles, covering problem definition, architectural options, detailed execution steps, configuration snippets, storage choices, and performance monitoring.
This guide curates essential books, professional training courses, and major conferences for industrial control systems cybersecurity, offering insights into historical context, technical security practices, and community engagement to help practitioners deepen their knowledge and connect with the field.
