System Security

Twenty Emergency Response Commands for Linux

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Twenty Emergency Response Commands for Linux

System Resource Anomalies System Resource Anomalies top<span><span><span># Real-time monitoring of CPU/memory, press P to sort by CPU (watch for suspicious processes with >70% usage)</span></span></span><span><span><span>htop</span></span></span><span><span><span># Enhanced version of top, supports mouse interaction (convenient for finding mining processes)</span></span></span><span><span><span>uptime</span></span></span><span><span><span># View system uptime (abnormal reboots may indicate an attack)</span></span></span><span><span><span>free</span></span></span><span><span><span>-h</span></span></span><span><span><span># Memory/swap usage (OOM may trigger abnormal processes)</span></span></span><span><span><span>df</span></span></span><span><span><span>-h</span></span></span><span><span><span># Disk space (watch … Read more

Understanding the Linux Command ‘chroot’

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Understanding the Linux Command 'chroot'

chroot Change the root directory to a specified target directory Additional Explanation <span>chroot</span> command is used to run commands in a specified root directory.<span>chroot</span>, which stands for change root directory, modifies the default directory structure of the Linux system, which typically starts from<span>/</span>, the root. After using<span>chroot</span>, the system’s directory structure will start from the … Read more

Research Status and Challenges of Networked Control System Security

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Abstract: The arrival of the Industrial 4.0 era, characterized by the deep integration of information technologies such as computing, communication, and control, has brought new opportunities and challenges to the research on security issues of networked control systems. The aim of research on networked control system security is to establish a complete system security defense … Read more

ANet Edge Computing Smart Gateway: A Data Interaction Bridge for Ubiquitous Power IoT

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ANet Edge Computing Smart Gateway: A Data Interaction Bridge for Ubiquitous Power IoT

1 Introduction In the wave of digital transformation, the power industry is undergoing unprecedented changes. The ANet series smart gateways launched by Ankerui Electric Co., Ltd. serve as a data interaction bridge between terminal devices and system platforms, providing strong technical support for the construction of a ubiquitous power IoT. This article will comprehensively analyze … Read more

Vulnerability Investigation Method of BusyBox in Emergency Situations

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Vulnerability Investigation Method of BusyBox in Emergency Situations

1. Basic Support Features of BusyBox1.Advantages of Static Compilation Does not rely on system dynamic link libraries (such as glibc), avoiding the risk of malicious dynamic library hijacking through LD_PRELOAD Provides a trusted command execution environment, preventing attackers from tampering with system commands like ls, ps, netstat, leading to erroneous information 2.Lightweight Tool Integration Packs … Read more

Ultimate Guide to Linux Permission Management for Beginners

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Linux | Red Hat Certified | IT Technology | Operations Engineer 👇 Join the tech exchange QQ group with 1000 members, note 【Public Account】 for faster access 1. User Types in Linux Before we dive into Linux permission management, let’s first understand a key concept: user types in Linux. In Linux, there are actually two … Read more