Today, we will analyze logs using Linux commands in a practical work scenario. This includes many useful tips that can significantly aid in performance testing, analyzing online logs, understanding user behavior, and troubleshooting issues. 1. Can we do this? When we want to analyze an online file, the first question to consider is whether we … Read more
In the world of Linux, there are a variety of open source web servers: from the classic Apache and Nginx to lightweight options like Lighttpd and Caddy, as well as specialized servers like Tomcat and Monkey. Each server has its own advantages and suitable scenarios. This article reviews 10 of the best open source web … Read more
sed is a command, short for Stream Editor, which is a stream-based text editor. It can quickly read, modify, and output text without the need for manual line-by-line editing. This efficient text processing capability makes sed excel in handling large amounts of text data, especially suitable for automation scripts and batch processing tasks. sed (stream … Read more
In 2025, Linux operations will no longer be as simple as “writing scripts and installing services”. With the development of cloud-native, automation, security, and intelligence, it will enter a whole new stage.This article will analyze the major transformations happening in Linux operations from five dimensions, illustrated with case examples to help you understand intuitively. 1️⃣ … Read more
Vulnerability Description: In the Linux kernel, the following vulnerability has been fixed in drm/mediatek: a potential use-after-free issue in the for_each_child_of_node() helper function, which releases each node reference it acquires while traversing child nodes. The explicit call to of_node_put() is only required when exiting the loop prematurely, removing the recently introduced unnecessary reference count decrement … Read more
Linux Configuration Management In today’s digital age, Linux, as a representative of open-source operating systems, is widely used in servers, cloud computing, embedded devices, and development environments. Configuration management is a core aspect of Linux system administration, involving system setup, maintenance, optimization, and automation. Through effective configuration management, administrators can ensure system stability, security, and … Read more
I am Shen Gong, a programmer working in the Internet of Things (IoT) in Shenzhen. No PowerPoint presentations, no grand visions, just practical solutions. Last week, a client asked me to calculate costs: 50,000 devices, each with a WiFi module costing 10 yuan, totaling 500,000 yuan just for the modules. With my solution: switch to … Read more
The three core protocols in Bluetooth Low Energy (BLE) are GAP, ATT, and GATT. They work together to define how BLE devices are discovered, connected, and communicate. In simple terms: GAP: Responsible for who is where. It handles device visibility, broadcasting, and connection establishment. ATT: Responsible for how to read/write. It defines the underlying mechanisms … Read more
Author | Fu Dongjie Shanghai Kongan Trusted Software Innovation Research InstituteSource | Jianyuan LaboratoryCommunity | Add WeChat ID “TICPShanghai” to join the “Shanghai Kongan 51fusa Security Community” 01 Introduction The Bluetooth protocol has evolved through multiple versions since its inception in 1999, continuously improving its functionality, and has become one of the most important short-range … Read more
Upon entering the hotel room, the lights automatically turn on, the curtains gently open, the air conditioning adjusts to a comfortable temperature, and the wireless network operates smoothly, as if a thoughtful butler has arranged everything in advance… Smart hotels are reshaping the accommodation experience through technology. The convenience and comfort brought by technology not … Read more