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Managing GRUB2 on Linux: A Guide to Configuration, Troubleshooting, and Boot System Customization

By admin March 26, 2026

GRUB2 is Linux's essential bootloader. This article shares practical experience on configuring, troubleshooting boot issues, and customizing GRUB2. You'll discover useful tips, detailed command examples, and best practices to fully master this powerful tool.

Centos

Install and Configure MariaDB on CentOS Stream 9: An Efficient MySQL Alternative

By admin March 25, 2026

This step-by-step guide is designed for IT beginners, helping you confidently deploy a powerful and stable MariaDB database system on CentOS Stream 9.

Linux

Understanding and Using Linux Capabilities: Fine-Grained Permissions Without Root for Applications

By admin March 25, 2026

Don't grant full root privileges to your application! This article provides a detailed guide on Linux Capabilities, a flexible permission mechanism that allows applications to perform privileged tasks without needing full root access. Includes a quick guide, in-depth explanations, and practical experiences for DevOps professionals.

Linux

Effective Linux Debugging: A Detailed Guide with journalctl and dmesg

By admin March 24, 2026

Debugging on Linux is an essential skill. journalctl and dmesg are two powerful tools that help you identify the root cause of any issue, from services to hardware. This article guides you on how to use them effectively.

Network

Professional IP Management: Efficient DHCP Server Configuration With Dnsmasq On Linux

By admin March 24, 2026

Configuring a DHCP server with Dnsmasq on Linux is an important network administration skill. This article provides detailed instructions from installation to advanced configuration tips, helping you proactively manage IPs, optimize performance, and avoid network conflicts.

Ubuntu

Optimizing Ubuntu Application Management with Snap and Flatpak: Practical Experience from ITFromZero

By admin March 24, 2026

With the advent of Snap and Flatpak, Linux application management, especially on Ubuntu, has become much richer. This article guides you through installing, removing, and updating applications using these two technologies, helping you optimize your workflow and leverage their benefits.

Network

Keepalived Configuration Guide: Building Virtual IP and High Availability on Linux

By admin March 23, 2026

Ever worried about system downtime? Keepalived helps solve this by creating Virtual IPs and ensuring high availability, keeping your services online.

Centos

Package Management with yum and rpm on CentOS: Install, Remove, and Manage Repositories

By admin March 23, 2026

A practical guide to package management with yum and rpm on CentOS: from installing and removing packages to adding repositories, handling dependencies, and rolling back after updates. Includes real-world experience from production server migrations.

Network

Setting Up a PXE Boot Server on Linux: Automated OS Installation Over the Network for Multiple Servers

By admin March 23, 2026

A hands-on guide to deploying a PXE Boot Server on Linux with dnsmasq, TFTP, and NFS for automated OS installation across multiple servers over the network. Covers detailed configuration, boot menus, BIOS/UEFI differences, and a quick health check script for the full stack.

Monitoring

Guide to Installing and Configuring Netdata for Effective Real-time System Monitoring

By admin March 22, 2026

Installing and configuring Netdata is key to effective real-time system monitoring. This article provides a step-by-step guide to setting up Netdata, helping you quickly grasp the operational status of your servers and applications.