Ubuntu tutorial - IT technology blog
Posted inUbuntu

Btrfs + Snapper on Ubuntu: Configure Automatic Snapshots and Instant Rollback When Your System Breaks

Btrfs snapshots combined with Snapper are the most effective way to protect your Ubuntu Server — automatically snapshotting before every apt run and rolling back from GRUB even when the system won't boot. This article compares it against rsync and Timeshift, walks through a step-by-step installation, and covers real-world recovery scenarios.
Virtualization tutorial - IT technology blog
Posted inVirtualization

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

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.