1.1 Web Security Vulnerabilities Before discussing web vulnerabilities, let me briefly talk about web security knowledge. Let’s briefly understand the knowledge related to computer networks and protocols. Composition of Computer Communication Networks A computer network consists of a communication subnet and a resource subnet. The communication subnet is responsible for the error-free and orderly transmission … Read more
Operating System:openEuler 24.03 LTS SP1, CentOS-8, AlmaLinux, Rocky Linux, etc.Preparation Steps1. Disable SELinux sestatus # Check status, 'disabled' indicates it has been disabled sed -i 's/^SELINUX=.*/SELINUX=disabled/' /etc/selinux/config # Disable SELinux setenforce 0 # Temporarily disable /usr/sbin/sestatus -v # Check SELinux status, 'disabled' indicates it is off 2. Firewall Configuration 2.1. Disable firewall: systemctl stop firewalld.service … Read more
Disk I/O performance is a core aspect of optimizing Linux system performance, especially in high-load scenarios such as database servers, virtualization environments, or big data processing platforms. Disk I/O bottlenecks can lead to slow system responses or even service interruptions. Monitoring and debugging disk I/O performance not only helps administrators quickly locate issues but also … Read more
Linux expr Command <span>expr</span> is a powerful command-line tool in Linux systems used for evaluating expressions, performing arithmetic operations, string manipulation, and logical comparisons. It is widely used in shell scripts for dynamic processing and value calculations. Although modern shells (like Bash) provide built-in arithmetic and string manipulation capabilities, <span>expr</span> still holds significant value due … Read more
1. SELinux and Firewall Optimization 1. SELinux SELinux, or Security-Enhanced Linux, is a Linux kernel module and a security subsystem for Linux, primarily developed by the National Security Agency (NSA). Its main purpose is to minimize the resources accessible to service processes in the system (principle of least privilege). Due to this principle, many operations … Read more
Table of Contents I. Theory 1. Kali Linux II. Experiment 1. Preparation for Installing Kali Linux on a Virtual Machine 2. Installing Kali Linux 3. Changing to Domestic Sources for Kali Linux 4. Setting a Static IP for Kali Linux 5. Enabling SSH Remote Access for Kali Linux 6. Remote Access to Kali Linux via … Read more
FunctionIntroductionOverview The D9 mobile terminal supports Bluetooth printers for printing. However, the system settings on the mobile terminal cannot adjust the printing style of the documents. Where can the printing style be set? Please see the specific operations below. PART 01 Log in to the D9 software – System Management – Mobile Version – Enter … Read more
In today’s fiercely competitive true wireless headphone market, semi-in-ear headphones have finally ushered in their noise-canceling revolution. While various manufacturers are still battling over parameters in the in-ear noise-canceling domain, the Edifier Lolli ANC has entered the battlefield with its stylish design and ‘semi-in-ear active noise cancellation’ technology, elevating the competition to a new dimension. … Read more
🔥 “It’s so annoying! Can’t even connect the Bluetooth in the Modern Tucson, you’re so outdated!” ❗ In this rapidly advancing technological era, the smart features in cars are becoming increasingly abundant, and Bluetooth connectivity is one of the most practical functions. Don’t underestimate it; I have a friend who bought a Modern Tucson, and … Read more
Beep!!! You have successfully paired with the “Bluetooth” of Xi’an Finance University In this hopeful place Let us join hands with youth To start a wonderful campus life P art 01. Classroom “Bluetooth” :Knowledge Sharing In the space where blackboards and screens intertwine The classroom “Bluetooth” quietly activates Group members sit together to discuss Ideas … Read more