To set up an FTP server on CentOS 7, it is recommended to use vsftpd. Below are the detailed steps: Step 1: Install vsftpd sudo yum install vsftpd -y Step 2: Start the service and set it to start on boot sudo systemctl start vsftpd sudo systemctl enable vsftpd Step 3: Configure the firewall # … Read more
This article compiles the top 50 questions frequently encountered in Linux system operation and maintenance interviews. Whether you are a beginner entering the IT industry or an experienced operations personnel aiming for promotion, these questions will provide you with comprehensive knowledge review and practical simulation, helping you stand out in interviews, successfully secure your desired … Read more
Understanding the Differences Between Linux Commands ‘su’ and ‘sudo’ Previously, I was confused about the two commands su and sudo. Recently, I specifically searched for information on this topic and finally clarified the relationship and usage of both commands. This article aims to systematically summarize the findings. 1 Preparation Since this blog involves user switching, … Read more
This article introduces practical methods for querying user information in Linux systems, focusing on command-line tools for obtaining user account details, login information, and user activity status. To create a new user, you can use the <span>useradd</span> command; to modify existing user attributes, you need to call the <span>usermod</span> command via the command line. The … Read more
Case IntroductionSmart Lock PCBAFunction Introduction1. Multiple Unlocking Methods Fingerprint Unlocking: Achieves fast and high-precision fingerprint recognition through capacitive or semiconductor fingerprint sensors, supporting 360° pressure from any direction. Password Unlocking: Supports touch password input and features a false password function, allowing the door to be opened even if interference codes are entered before and after … Read more
In Linux system administration, the Principle of Least Privilege (PoLP) is one of the core principles of secure operations. Directly using the <span>root</span> user for operations carries high risks; it is recommended to create an administrator user with <span>sudo</span> privileges (such as <span>admin</span>) to reduce the impact of accidental operations and security threats. This article … Read more
In Linux systems, understanding the system’s login history is crucial for system management and security auditing. The last command helps us easily view the system’s login history records. Today, let’s learn about this super useful command—last.1. What is the last Command?The last command is used to display the system’s login history. It lists the login … Read more
Linux | Red Hat Certification | IT Technology | Operations Engineer 👇 Join our technical exchange QQ group with 1000 members, note 【public account】 for faster approval 1. Introduction to Shell Commands Before understanding Linux operating permissions, let’s add a knowledge point: shell – command line interpreter. For Linux, it is the operating system, which … Read more
Introduction The project development requirement is to automatically create a user with a password after booting. The provided SDK only has the adduser command. This command requires terminal interaction when adding a user. It requires manually entering the password twice, so it cannot be created simply through a script. To achieve automatic password filling, we … Read more
The Linux system is a multi-user, multi-tasking time-sharing operating system. Any user who wants to use system resources must first apply for an account from the system administrator and then log into the system with this account. A user’s account can help the system administrator track users who use the system and control their access … Read more