A free fully functional file recovery utility for Linux operating systems and multiple Unix systems using Ext2/Ext3/Ext4 FS file systems System Requirements Intel compatible platform running Windows 11/10/8.1/8/7/Vista/XP/2000 Windows Server 2022/2019/2016/2012/2008/2003. At least 256 MB of RAM, a mouse, and sufficient disk space to store recovered files, image files, etc. Administrative privileges are required to … Read more
Introduction: The Complex Nature of Packet Loss Issues Network packet loss on Linux servers is one of the tricky problems that operations engineers often encounter. It may manifest as slow application responses, intermittent service interruptions, or degraded user experiences. Unlike systems like Windows, Linux, with its robust network stack and rich diagnostic tools, can achieve … Read more
Establishing Summer The following is a practical summary of backups for virtual machines, physical machines, operating systems, applications, files, and databases. It summarizes various dimensions including backup types, technical methods, tool selection, precautions, and recovery strategies, suitable for enterprise-level system maintenance and disaster recovery. 1 Multidimensional Summary of Backup-Related Content 1. Overview of Backups 2. … Read more
Click the blue text above to follow me! OverviewTechnically speaking, iptables is not a firewall; the real firewall is netfilter, which runs in the system kernel. iptables is merely a representative of netfilter, primarily functioning to interact with users, obtaining their requests and converting them into information that netfilter can accept.iptables mainly operates at the … Read more
RedHat Linux 7.6 Installation Guide This installation example is performed on a virtual machine. Virtual Machine System Information Virtual Machine Software: VMware® Workstation 16 Pro Version: 16.0.0 build-16894299 1.System Image Version rhel-server-7.6-x86_64-dvd.iso 1.Installation Process (The installation process based on the virtual machine has the same prerequisites) Select the first option to install the system directly. … Read more
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