admin – Page 79 – ITFROMZERO

Kubernetes Security: Essential Steps to Protect Your Cluster

By admin March 23, 2026

A Kubernetes cluster has numerous security vulnerabilities out of the box if it isn't properly hardened. This article breaks down the most common causes and walks through setting up RBAC, Pod Security, Network Policy, secret management, and runtime monitoring to effectively protect your production cluster.

Centos

Cockpit Usage Guide: Super-Efficient Web Interface Management for CentOS Stream 9

By admin March 23, 2026

Manage CentOS Stream 9 more easily with the Cockpit web interface. This guide will show you how to install, configure, and use advanced features, along with practical tips for efficient server administration.

Database

Guide to Using SQLite with Python: Lightweight Database for Automation Scripts and Small Applications

By admin March 22, 2026

When you need a lightweight, no-fuss database for Python scripts or small applications, SQLite is an indispensable choice. This article guides you from A-Z on using SQLite with Python, covering basic operations to advanced techniques, helping you deploy quickly and without headaches.

Development

Writing Unit Tests for Python Applications with Pytest: A Basic to Practical Guide

By admin March 22, 2026

Pytest is a powerful framework for writing unit tests for Python applications. This article provides detailed instructions on how to install and configure test cases, from basic to advanced concepts like fixtures, parameterization, and mocking. You'll also learn how to run tests and measure code coverage to ensure code quality.

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.

Python

Python and Linux: Useful Sysadmin Scripts for Task Automation

By admin March 22, 2026

How to effectively handle repetitive tasks on Linux? Python is the answer. This article guides you on writing useful Python scripts to automate system administration work, helping you be more efficient and reduce risks.

Linux

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.

Security

System File Integrity Monitoring with AIDE on Linux: Early Intrusion Detection and Data Tampering Prevention

By admin March 22, 2026

Ensuring Linux server security is a top priority, and File Integrity Monitoring (FIM) with AIDE is an effective solution. This article shares practical experience deploying AIDE for early intrusion detection and prevention of system data tampering.

MySQL

Practical Experience: Optimizing MySQL Query Performance with Index and EXPLAIN

By admin March 22, 2026

This article shares practical experience on how to optimize MySQL query performance using Indexes and the EXPLAIN tool. Learn about different Index types, how to analyze query execution plans, and important considerations when applying them to make your system run faster and more stable.

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.