オープンソースの力を活用する方法~Ubuntuの世界へようこそ~

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Security and User Management
  • 2025-12-08

How to Configure the UFW Firewall on Ubuntu: Installation, Rules, Logging, and Security Guide

1. Introduction The Importance of Firewalls in Ubuntu Any system connected to the internet is exposed to potential risks, including unauthorized access from external sources. A firewall is essential t […]

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Development Environment Setup
  • 2025-12-12

How to Install and Secure MySQL on Ubuntu: Complete Guide for Setup, User Management, and Maintenance

1. Purpose and Benefits of Installing MySQL on Ubuntu By installing MySQL in an Ubuntu environment, you can efficiently manage data for business and web applications. MySQL is lightweight, fast, and c […]

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Basics of Ubuntu
  • 2025-12-08

How to Safely Delete Directories in Ubuntu: Commands, Options, and Recovery Methods

1. Introduction Deleting directories in Ubuntu is an essential task for efficient file management. However, unlike some desktop environments, deleted directories in Linux are not moved to a trash bin— […]

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Security and User Management
  • 2025-12-08

Understanding and Managing the Root Account in Ubuntu: Security, Activation, and Best Practices

1. Overview and Role of the Root Account in Ubuntu The “root account” in Ubuntu is a special user account with the highest level of access across the entire system. It allows administrators to perform […]

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Basics of Ubuntu
  • 2025-12-08

Why 32-Bit Support Still Matters on Ubuntu: Current Status, Risks, and Best Alternatives

1. Why 32-Bit Support Is Still Necessary on Ubuntu Overview As most systems transition to 64-bit architectures, the need for 32-bit support continues in environments with older PCs or limited resource […]

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Troubleshooting
  • 2025-12-08

How to Fix Ubuntu Installation Issues: Causes, Solutions, and Step-by-Step Troubleshooting

1. What Causes Ubuntu Installation Problems? Ubuntu is one of the most widely used Linux distributions, known for being open-source, lightweight, and popular among both beginners and advanced users. H […]

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Security and User Management
  • 2025-12-08

How to Add Users and Manage sudo Privileges in Ubuntu: A Complete Beginner-Friendly Guide

1. Introduction Why Manage Users in Ubuntu? When using Ubuntu or other Linux-based operating systems, situations often arise where you need to add multiple users to the system and assign different per […]

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Basics of Ubuntu
  • 2025-12-08

What Is Ubuntu? A Complete Beginner-Friendly Guide to Downloading, Installing, and Setting Up Ubuntu Linux

1. What Is Ubuntu? A Beginner-Friendly Open-Source OS with Powerful Features Ubuntu is one of the most popular Linux distributions used by countless users around the world. As an alternative to operat […]

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Basics of Ubuntu
  • 2025-12-08

What Is Ubuntu LTS? Full Guide to Ubuntu 24.04 LTS Features, Support Cycle, and Setup Tips

1. What Is Ubuntu LTS? Importance and Core Overview Ubuntu is one of the most widely used Linux distributions among engineers and IT users around the world. Among its releases, the most popular is the […]

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Security and User Management
  • 2025-12-08

How to Switch to the Root User in Ubuntu Safely: Complete Guide to sudo, su, and Root Shell Access

1. Introduction In Ubuntu, certain system administration tasks require root privileges, which are not accessible to regular users. The root account functions as the system’s “administrator account” an […]

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CATEGORY

  • Basics of Ubuntu
  • Network Configuration
  • System Administration and Optimization
  • Security and User Management
  • Development Environment Setup
  • Software and App Management
  • Troubleshooting
  • Customization and Configuration
  • Server Setup and Management
  • Backup and Recovery
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