RHEL

Linux Operating System Configuration and Management – Lesson 2: Graphical and Character Interfaces of RHEL 8.1

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Linux Operating System Configuration and Management - Lesson 2: Graphical and Character Interfaces of RHEL 8.1

This content is derived from the book edited by Teacher Xia Liqin, titled “Linux Network Operating System Configuration and Management”, intended for the teaching of first-year vocational college students. Let’s work hard together for those who want to learn seriously! 1. Introduction The Linux operating system provides two operating environments: graphical and character interfaces. The … Read more

Rebuilding initramfs with dracut to Repair Linux Systems

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Rebuilding initramfs with dracut to Repair Linux Systems

In some cases, a Linux system may fail to operate normally due to the following reasons: Corrupted or misconfigured initramfs initramfs not generated correctly after a kernel upgrade The system cannot enter the normal boot process (e.g., stuck at the dracut command line, or displaying ‘Cannot find root device’, or stuck at ‘Loading initial ramdisk … Read more

Assigning Multiple IP Addresses to a Single Network Interface in Linux

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Assigning Multiple IP Addresses to a Single Network Interface in Linux

The concept of creating or configuring multiple IP addresses on a single network interface is known as IP aliasing. This technique is particularly useful in web server environments, allowing multiple IP addresses to be bound to a single network interface within the same subnet, thereby enabling the hosting of multiple virtual sites on a single … Read more

Ansible Firefighting Hotline Series (28) Automated HttpYum Configuration

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⏰ Ansible Firefighting Hotline | Confused about YUM source configuration? One-click automated configuration of local RHEL repository, say goodbye to network dependency! Are you still struggling with the chaotic YUM source configuration on your server? Today, I bring you a nanny-level automated configuration solution for the local RHEL YUM repository, allowing you to say goodbye … Read more

Ansible Firefighting Hotline Series (26) Automated OS Performance Analysis

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💥 Ansible Firefighting Hotline | Is OS Performance Analysis Too Complicated? One-Click PCP Automated Inspection Turns You into a Performance Expert! Are you still struggling with system performance analysis? Manually running a bunch of commands like top, iostat, vmstat, free… leads to scattered information that is hard to integrate, and you might miss key metrics. … Read more

Ansible Firefighting Hotline Series (23): Automated Diagnosis for High Memory Utilization Made Easy for Admins

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⏰ Ansible Firefighting Hotline | Memory Utilization Spiking? One-Click Automated Diagnosis Turns You into a Memory Optimization Expert! Are you still struggling with server memory utilization alerts? Today, we bring you a comprehensive automated diagnosis solution for high memory utilization on RHEL servers, allowing you to say goodbye to the nightmare of manual troubleshooting! 🎯 … Read more

Ansible Emergency Hotline Series (24): Automated Diagnosis of Memory OOM

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Ansible Emergency Hotline Series (24): Automated Diagnosis of Memory OOM

💥 Ansible Emergency Hotline | Troubled by Memory Out of Memory (OOM) Troubleshooting? One-Click Automated Diagnosis Turns You into a Memory Expert! Are you still struggling with the tedious troubleshooting of Out of Memory (OOM) issues? Today, we bring you a comprehensive automated analysis solution for OOM issues on RHEL8/9 & CentOS8/9, allowing you to … Read more

A Beginner’s Guide to Linux for Freshmen: Why Start with the RHEL Series?

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A Beginner's Guide to Linux for Freshmen: Why Start with the RHEL Series?

As we begin to explore the vast world of operating systems, the name “Linux” repeatedly comes up. Faced with hundreds of different “versions” (which we call distributions), many students feel confused: which one should I start with? Don’t worry, this article will clear up the fog for you. My core advice is very clear: For … Read more

Ansible Firefighting Hotline Series (20): Automated Analysis of Nginx Service Failures

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Ansible Firefighting Hotline Series (20): Automated Analysis of Nginx Service Failures

🔍 Ansible Firefighting Hotline | Struggling with Nginx Service Failures? One-Click Automated Diagnosis Turns You into a Web Expert! Are you still struggling with chaotic troubleshooting of Nginx service failures? Today, we bring you a comprehensive automated analysis solution for Nginx service failures on RHEL8/9 & CentOS8/9, allowing you to say goodbye to the nightmare … Read more

Differences Between Various Linux Versions

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I have never quite understood the differences between RHEL, CentOS, Ubuntu, and Fedora. After some research, I have organized the information here for reference. The most concerning points are: 1. CentOS is the free version based on RHEL; 2. Ubuntu is suitable for desktop applications, while RHEL is suitable for enterprise applications. 1. Differences Between … Read more