ITFROMZERO – Share tobe shared!

Optimizing Secure Management of Secrets, API Keys, and Credentials on Linux with HashiCorp Vault

By admin March 13, 2026

Managing secrets like API keys and credentials is a major challenge for many IT engineers. HashiCorp Vault offers a powerful solution to address this problem. This article guides you through installing, configuring, and using Vault on Linux, helping to maximize the protection of sensitive data.

Virtualization

How to Configure Nested Virtualization on Proxmox VE: Running Hypervisors (ESXi, KVM) Inside Virtual Machines for Complex Lab Setups

By admin March 12, 2026

Create complex virtual labs like vCenter, Kubernetes clusters with Nested Virtualization on Proxmox VE. This article provides a step-by-step guide to enabling this feature, allowing you to run ESXi or KVM inside virtual machines to maximize existing hardware resources.

Git

Git Stash: A Quick Solution When Urgent Issues Interrupt Unfinished Work

By admin March 12, 2026

Deep in coding, but your boss calls with an urgent production bug? Git stash is the tool to temporarily save your work without committing, keeping your branch clean to handle emergencies. This article provides a detailed guide on using git stash, from basic to advanced commands, helping you master this essential tool.

MySQL

Setting Up and Configuring ProxySQL: A Connection Pooler and Load Balancer Solution for MySQL Production

By admin March 12, 2026

ProxySQL is a powerful connection pooler and load balancer that optimizes performance and stability for MySQL production. This article provides a guide to basic and advanced installation and configuration, along with practical tips for effective ProxySQL deployment, addressing connection management and load distribution issues.

Network

Basic Network Knowledge for SysAdmins: IP, Subnet, Gateway – Indispensable Foundations

By admin March 12, 2026

This article delves into three foundational concepts of computer networking: IP Address, Subnet Mask, and Gateway. You'll understand how they work, why they're crucial for SysAdmins, and how to configure them on Linux, along with practical experiences from a SysAdmin managing office and datacenter networks.

Fedora

Configuring Btrfs Subvolumes on Fedora: Optimizing Space and Rapid System Recovery

By admin March 11, 2026

This article provides detailed instructions on configuring and managing Btrfs subvolumes on Fedora. Learn to create and manage snapshots for system rollbacks and optimize disk space, ensuring stability and flexibility for IT workflows.

Security

Hashing and Data Encoding: MD5, SHA-256, Base64, and Their Applications in IT Security

By admin March 11, 2026

In the IT world, data security is crucial. This article shares practical experiences with common vulnerabilities and how concepts like Hashing, MD5, SHA-256, and Base64 help protect critical information. A detailed guide from theory to practice.

MySQL

MySQL Full-Text Search: The Secret to Super-Fast and Accurate Search for Your Applications

By admin March 11, 2026

Search functionality is vital for many applications, but `LIKE` often leads to poor performance. This article guides you on using MySQL Full-Text Search to build super-fast, effective search with relevance ranking directly within your database.

Ubuntu

Installing and Configuring Squid Proxy Server on Ubuntu: Effective Internet Access Control

By admin March 11, 2026

In an enterprise environment, internet access control is essential. This article shares practical experience on installing and configuring Squid Proxy on Ubuntu. This solution helps you manage bandwidth, block unwanted websites, and enhance network security, based on the success of the DevOps team.

Python

Python requests Tutorial for API Calls: From Basic to Advanced

By admin March 11, 2026

A detailed guide on using the Python requests library for API communication. Covers basic GET, POST requests, JSON handling, authentication, and performance optimization tips from experience with large datasets.

Deploying MySQL 8 on Fedora Server: Production Configuration Guide and SELinux Troubleshooting

Vagrant + KVM/Libvirt: How to Double Your VM Speed on Linux

Gitolite: Ultra-lightweight Git Server Management for 1GB RAM VPS

MongoDB + Python: From Basic CRUD to Advanced Aggregation with PyMongo

Guide to Using git-sizer: “Rescuing” Bloated and Sluggish Git Repositories

Process Python Data Like a Pro with Counter, defaultdict, and deque

VMware vSphere NIOC Configuration Guide: Eliminating Noisy Neighbors and Optimizing Bandwidth

Deploying Metabase with Docker: A Self-Service BI Solution to Replace Manual Data Extraction

Packaging Linux Applications: A Complete Guide to flatpak-builder on Fedora

MySQL 9.0 and VECTOR: Embedding Storage Solution for AI Apps Without a Secondary DB

Optimizing Secure Management of Secrets, API Keys, and Credentials on Linux with HashiCorp Vault

How to Configure Nested Virtualization on Proxmox VE: Running Hypervisors (ESXi, KVM) Inside Virtual Machines for Complex Lab Setups

Git Stash: A Quick Solution When Urgent Issues Interrupt Unfinished Work

Setting Up and Configuring ProxySQL: A Connection Pooler and Load Balancer Solution for MySQL Production

Basic Network Knowledge for SysAdmins: IP, Subnet, Gateway – Indispensable Foundations

Configuring Btrfs Subvolumes on Fedora: Optimizing Space and Rapid System Recovery

Hashing and Data Encoding: MD5, SHA-256, Base64, and Their Applications in IT Security

MySQL Full-Text Search: The Secret to Super-Fast and Accurate Search for Your Applications

Installing and Configuring Squid Proxy Server on Ubuntu: Effective Internet Access Control

Python requests Tutorial for API Calls: From Basic to Advanced