1. System Resource Monitoring 1.1 CPU Issue Diagnosis # Check CPU usage top htop # Sort processes by CPU usage ps aux –sort=-%cpu | head # Check CPU information lscpu cat /proc/cpuinfo # Monitor CPU usage mpstat -P ALL 1 # Check interrupt statistics cat /proc/interrupts 1.2 Memory Issue Diagnosis # Check memory usage free … Read more
Introduction In enterprise-level Linux operations, “networking” is always one of the core foundations. From IP address configuration, network interface management to checking connectivity and troubleshooting, you will inevitably encounter a large number of network-related tools. This article will systematically guide you through the network configuration methods and common commands in RHEL9, laying a solid foundation … Read more
The early winter in the old alley of Shui Nan is particularly quiet, with only the occasional sound of the wind outside the old apartment. On a sunny weekend, Xiao Lin bought several plastic storage boxes, planning to organize her wooden bookshelf properly. “I am—” A cheerful response suddenly appeared. Clearly, no one called, yet … Read more
November 24, 2025 01 Mobile Repair Expert Liang Ge Keeping up with technology trends, delivering the latest updates in the digital field daily, and sharing repair knowledge. The core of Type-C to Type-C connection isthe negotiation of the master-slave roles through the CC pins (who is the power supply/data host, and who is the power … Read more
Microcontroller repair essentials! Use a digital multimeter to determine chip functionality in 3 steps, making it accessible for beginners. Is troubleshooting microcontroller circuit boards difficult? The key is to check if the chip is damaged! With the current affordable prices of microcontroller chips, the focus of repair is not on the cost of replacement parts, … Read more
[Image]Introduction: In responding to inquiries in the studio, questions regarding the installation methods, troubleshooting, and precautions for AB programming software account for a significant portion. Although we strive to respond, the repetitive nature of these questions can consume a lot of valuable time. Previously, we shared an article titled “Precautions for Installing and Using AB … Read more
20 Linux Network Commands Every Engineer Should Know (But Most Don’t) When our production server goes down at 3 AM, we don’t want to spend time Googling “how to debug network issues”. You need to be well-versed in these commands. I have been there, frantically troubleshooting connection issues with stakeholders breathing down my neck. After … Read more
Today, due to a broadband upgrade, my MacBook Pro suddenly could not access the internet. This was quite frustrating for me, but after some searching and attempts, I found a method that effectively resolves this issue, and I would like to share it.1. Click on the Wi-Fi icon, then find the details in the connected … Read more
San Pao’sHardware Development Learning Notes Sharing knowledge to enhance skills♥Exchanging experiences to strive for excellence Table of Contents 1. Description of Anomalies2. Investigation and Analysis Process3. Problem Identification4. Solutions5. Complaints about the validation of replacement materials ✍ Understanding the differences between crystal oscillators and crystals, design selection Recommended previous notes👆 The specific reason for replacing … Read more
💾 Linux Storage Failure Emergency Guide | File System Crashed? LVM Error? These 5 Tips Will “Resurrect” Your Data! 📖 Introduction: Do You Feel This Way Too? First Paragraph: Pain Point Scenario Have you ever encountered this nightmare scenario? The system suddenly crashes, and after rebooting, it prompts “file system corrupted,” making all data inaccessible. … Read more