The default gateway in Linux is the IP address of the router that forwards packets when the Linux system accesses other networks (such as the Internet). It is a core configuration for achieving inter-network communication. Core Function 01 The core value of the default gateway lies in solving the problem of “the local network cannot … Read more
Linux VLAN Trunking and Subinterface Configuration In today’s network architecture, VLAN (Virtual Local Area Network) is a core technology for isolating network traffic, enhancing security, and improving management efficiency. As a representative of open-source server platforms, Linux systems support flexible VLAN trunking and subinterface configuration. This not only helps administrators manage multiple VLANs over a … Read more
Linux Configuration of IPv4 or IPv6 Addresses Configuration Configuration Introduction • View Network ifconfig • Network Interface Introduction • <span>eth0</span> : Local network interface (CentOS7 uses ens33) • <span>lo</span> : Internal network interface, manages internal IP, which is the 127.0.0.1 address • <span>virbr0</span> : Virtual network interface • Configuration File <span>ifcfg-<interface></span> • <span>ifcfg-eth0</span> : Configuration … Read more
The IP address in Linux systems is essentially a logical address used to identify devices in a network, divided into two main categories: IPv4 and IPv6. In daily use, IPv4 is predominant, and the configuration methods are categorized into temporary and permanent configurations. Classification of IP Addresses 01 The IP addresses in Linux systems follow … Read more
In Linux systems, modifying routes (i.e., configuring the network routing table) is primarily done using the ip route command (recommended, part of the iproute2 toolkit, standard in modern Linux distributions) or the traditional route command (older, still supported by some systems). Here are common operations and examples: 1. View Current Routing Table Before making changes, … Read more
Previously, I introduced the installation processes of Rocky Linux 10, Ubuntu 25.04, Ubuntu Server 24.04, Debian 12, and Deepin 25.0.1. I also noticed that there is another distribution of Linux that is quite popular, especially in the server domain. This distribution is a lightweight version characterized by security, simplicity, efficiency, and low resource usage. Many … Read more
Virtual Machine Software VMware Workstation As one of the world’s most renowned virtualization companies, VMware has over 20 years of development history. For personal users, VMware offers VMware Fusion for Apple Mac and VMware Workstation for PCs. 1 What is VMware VMware Workstation is a powerful virtual machine software widely used in personal and enterprise … Read more
The network configuration of Linux systems is one of the core tasks of system administration. However, due to the differences in tools and configuration file formats used by different distributions, the methods for network configuration vary. This article will detail the network configuration methods of mainstream Linux distributions, including temporary configurations, permanent configurations, and the … Read more
The Linux operating system is widely used in servers, embedded systems, and personal computers due to its stability, security, and flexibility. Mastering common Linux commands is fundamental to efficiently using the Linux system. This article systematically introduces common Linux commands, covering file management, system monitoring, user management, and more. 1. File and Directory Management File … Read more
Basic Concepts of Firewalls All security topics are inseparable from the involvement of firewalls, especially in <span>OpenWrt</span>. Understanding the concept of firewall zones and the three types of rules is essential for correctly configuring SSH, VPN, port forwarding, and other functions. What is a Firewall Zone? In OpenWrt, firewalls do not write rules for individual … Read more