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Virtualization tutorial - IT technology blog

QEMU Guest Agent: Installation and Configuration on Linux/Windows for Consistent Snapshots and VM Monitoring

By admin June 20, 2026

QEMU Guest Agent (qemu-ga) is a daemon running inside the VM that freezes the filesystem before snapshots are taken, ensuring data consistency and preventing corruption on restore. This guide covers installation on Linux and Windows, configuration with KVM/libvirt and Proxmox, plus troubleshooting for common issues.

VMware

vCenter Backup: Why Snapshots Aren’t Enough and a Guide to Setting Up File-Based Backup Properly

By admin June 20, 2026

Learn how to configure File-Based Backup for VMware vCenter (VCSA) to protect your management system. A detailed guide from automated setup to real-world recovery.

Security

Ransomware Defense on Linux Servers: Proactive Protection, Early Detection, and Data Recovery

By admin June 17, 2026

A practical guide to Linux server ransomware defense using a defense-in-depth model: SSH hardening, abnormal encryption detection scripts, offline backups with BorgBackup, and an incident response plan for when things go wrong. Aimed at sysadmins and DevOps teams managing production servers.

Database

SQLite in Production: Effortless Real-time Backup with Litestream

By admin June 15, 2026

Stop worrying about data loss with SQLite. Learn how to use Litestream to automatically back up your database to Cloudflare R2/S3 in real time, giving your production application rock-solid data protection.

Virtualization

How to Install Veeam Backup & Replication for Proxmox VE Virtual Machine Backup

By admin June 10, 2026

A comparison of vzdump, Proxmox Backup Server, and Veeam to help you choose the right backup solution for your environment. Step-by-step guide to installing Veeam Backup & Replication Community Edition for free, connecting Proxmox VE, creating backup jobs, and performing Instant VM Recovery.

MySQL

Percona XtraBackup Guide: Back up 100GB+ MySQL Databases Without System Freezes

By admin May 16, 2026

No more website crashes during MySQL backups! A detailed guide on using Percona XtraBackup for safe Hot Backups of large data without table locking.

Ubuntu

BorgBackup on Ubuntu: ‘Super-Compressed’ Backup Solution and Secure Encryption for Sysadmins

By admin May 12, 2026

Guide to installing BorgBackup on Ubuntu. A smart backup solution that saves 90% storage space through Deduplication and provides absolute security with AES-256 encryption.

Git

Git Bundle: The Pro Way to Package Repositories for Offline Work

By admin May 8, 2026

Forget manual .zip compression. Git bundle is the professional way to package an entire repository and its commit history into a single file for offline workflows.

Centos

Mastering ReaR (Relax-and-Recover): A Bare Metal Disaster Recovery Solution for CentOS

By admin May 1, 2026

Don't let server disasters keep you up at night. Learn how to use ReaR on CentOS for full system Bare Metal Recovery in just 15 minutes.

Linux

How to Use rclone to Sync and Backup Data from Linux to the Cloud (Google Drive, S3, OneDrive)

By admin April 8, 2026

A step-by-step guide to installing and configuring rclone on Linux to sync and backup data to Google Drive, Amazon S3, and OneDrive using practical commands. Includes how to automate backups with cron and tips for optimizing performance.