Feeling unwell, I initially thought of skipping this update. However, I happened to meet a security guard who was fiddling with his vegetable pot. After chatting for a while and seeing him remove some plants he deemed worthless, I took one to plant on the third-floor flower bed. Even if it only lasts three seasons, … Read more
In Linux systems, absolute paths and relative paths are core concepts for locating files and directories, with significant differences in usage scenarios, syntax, and functionality. Here is a detailed analysis: 1. Definitions and Syntax Absolute Path Definition: Starts with the root directory <span>/</span> and describes the complete path to the target file or directory step … Read more
Image source: Internet In Linux systems, there are many performance monitoring tools. Below, I will introduce several commonly used command-line tools. 1. top/htop top: Function: Real-time monitoring of processes, displaying information about CPU, memory, load, swap space, etc. Common Shortcuts: Shortcut Description M Sort by memory usage P Sort by CPU usage k Kill a … Read more
After the system starts, memory allocation and release in the Linux system kernel is performed using the buddy system mechanism after the mem_init() function completes. This mechanism can allocate both high memory and low memory. In addition to the buddy system, Linux has several other methods for memory allocation and release, but they are all … Read more
Linux Touch Command 1. Introduction In Linux systems, <span>touch</span> is a simple yet powerful command-line tool primarily used to create empty files or update the access and modification timestamps of files. Although its functionality appears straightforward, by combining different options and scenarios, the <span>touch</span> command can achieve many advanced uses, especially in scripting, file management, … Read more
Click the video above to play The addition of a touchpad, a price reduction of over 1000 compared to the official Magic Keyboard, a comfortable typing experience, an enlarged soft rubber hinge area, and support for Bluetooth 5.0 make the Brydge Pro+ keyboard a more complete product compared to its predecessor, making it look even … Read more
Recently, I came across a news story about a couple in Chongqing who broke up due to a misunderstanding caused by the girl’s phone automatically connecting to the hotel Wi-Fi. The incident unfolded as follows: when the girl and her boyfriend checked into the hotel, her phone automatically connected to the hotel Wi-Fi, which had … Read more
Understanding IBSS (Ad-Hoc) Mode in Wi-Fi Networks 1. Basic Concept of IBSS In wireless networks, IBSS (Independent Basic Service Set) is a network topology defined by the IEEE 802.11 standard, also known as Ad-Hoc mode. Unlike the common Infrastructure Mode, IBSS allows multiple devices to communicate directly without the need for an Access Point (AP), … Read more
Nowadays, public places such as airports, train stations, and shopping malls commonly offer free Wi-Fi services, allowing users to easily connect to the internet and enjoy a convenient online experience. However, this convenience hides significant security risks that cannot be ignored. It is important to note that if these open networks are exploited by malicious … Read more
The Wi-Fi, NB, and 4G smoke detectors differ mainly in network technology, applicable scenarios, power consumption, and cost. Below is a comparative analysis based on core dimensions: 1. Network Technology and Coverage Wi-Fi Model Technical Principle: Relies on local Wi-Fi networks for data transmission and requires a router. Coverage Area: Limited to the Wi-Fi signal … Read more