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Guide to managing Logical Volumes (LVM) on Linux: Create, extend, and shrink partitions flexibly

By admin March 22, 2026

LVM (Logical Volume Manager) is a flexible disk space management solution on Linux, allowing easy creation, extension, and shrinking of partitions. This article provides detailed instructions for LVM operations from basic to advanced, along with practical examples and personal experiences.

Linux

Customizing Kernel Parameters with sysctl on Linux: Optimizing Server Performance and Security

By admin March 22, 2026

Adjusting kernel parameters with sysctl is a powerful technique to optimize Linux server performance and enhance security. From a late-night troubleshooting experience, I realized that understanding kernel behavior and knowing how to fine-tune it can save a system in the most critical situations. This is an indispensable skill for any IT engineer managing Linux production systems.

Linux

Guide to Using fsck to Check and Repair File System Errors on Linux: Recovering Data and Maintaining Stability

By admin March 21, 2026

As an IT engineer, I frequently face unexpected system incidents. Linux file system errors are among them, potentially causing data loss and significant downtime. This article guides you on using the `fsck` command to effectively check and repair these errors.

Linux

Optimize Linux server performance for production: A detailed guide for beginners

By admin March 17, 2026

This article provides a detailed guide on how to optimize Linux server performance for a production environment. From resource monitoring to fine-tuning CPU, RAM, Disk I/O, and Network, it's aimed at beginners.

Linux

How to Configure sudo and the sudoers File on Linux: Safe Permission Management for Each User

By admin March 15, 2026

A comparison of 3 approaches to granting sudo access on Linux: adding users to the wheel/sudo group, editing /etc/sudoers directly, or using /etc/sudoers.d/. Covers the pros and cons of each approach along with practical configuration guides using visudo, Command Aliases, and NOPASSWD for team-based production environments.

Linux

Log Rotation on Linux with Logrotate: Rescuing Your Disk Drive in the Middle of the Night

By admin March 10, 2026

As an IT engineer, I've experienced servers crashing at 2 AM due to full log files. This article consolidates hard-earned experience on using Logrotate on Linux, an indispensable tool for automatically managing, rotating, and compressing log files to keep your system stable and efficient.

Linux

Linux Disk Mount and Management Guide: From lsblk to fstab

By admin March 7, 2026

A detailed guide to mounting and managing disks on Linux: identifying block devices with lsblk, creating partitions with parted/fdisk, formatting filesystems with ext4/xfs, and configuring fstab with UUIDs for persistent mounts. Real-world experience from a CentOS 7 production server.

Linux

Monitoring Linux System Resources with htop and iotop: A Practical Guide

By admin March 6, 2026

A practical guide to using htop and iotop for monitoring CPU, RAM, and disk I/O on Linux servers. Covers metric interpretation, practical keyboard shortcuts, common bottleneck diagnostic scenarios, and automated monitoring scripts.

Linux

Configuring a Firewall with iptables on Linux: A Production-Ready Script for Web Servers

By admin March 4, 2026

A production-ready iptables script for web servers: chains and tables structure, SSH rate limiting, locking down MySQL and Redis, and how to persist rules across reboots. Includes a tip to avoid locking yourself out during testing.

Linux

How to Use rsync for Efficient File Synchronization on Linux

By admin March 4, 2026

rsync solves the file synchronization problem more intelligently than plain cp by transferring only the data that has actually changed. This guide covers rsync from the basics through setting up automated SSH-based backups with real-world cron job examples.