ArchLinux : BTRFS & Snapper

ArchLinux : Arch Linux is an independently developed, x86-64 general purpose GNU/Linux distribution versatile enough to suit any role. Development focuses on simplicity, minimalism, and code elegance. Arch is installed as a minimal base system, configured by the user upon which their own ideal environment is assembled by installing only what is required or desired for their unique purposes. GUI configuration utilities are not officially provided, and most system configuration is performed from the shell by editing simple text files. Arch strives to stay bleeding edge, and typically offers the latest stable versions of most software.

Arch Linux uses its own Pacman package manager, which couples simple binary packages with an easy-to-use package build system. This allows users to easily manage and customize packages ranging from official Arch software to the user's own personal packages to packages from 3rd party sources. The repository system also allows users to easily build and maintain their own custom build scripts, packages, and repositories, encouraging community growth and contribution.

The minimal Arch base package set resides in the streamlined [core] repository. In addition, the official [extra], [community], and [testing] repositories provide several thousand high-quality packages to meet your software demands. Arch also offers the Arch Linux User Repository (AUR), which contains more than 49,000 build scripts, for compiling installable packages from source using the Arch Linux makepkg application.

Arch Linux uses a "rolling release" system which allows one-time installation and perpetual software upgrades. It is not generally necessary to reinstall or upgrade your Arch Linux system from one "version" to the next. By issuing one command, an Arch system is kept up-to-date and on the bleeding edge.

BTRFS : Btrfs is a computer storage format that combines a file system based on the copy-on-write principle with a logical volume manager, developed together. It was initially designed at Oracle Corporation in 2007 for use in Linux, and since November 2013, the file system's on-disk format has been declared stable in the Linux kernel.

Snapper : Snapper is a tool for Linux filesystem snapshot management. Apart from the obvious creation and deletion of snapshots, it can compare snapshots and revert differences between snapshots. In simple terms, this allows root and non-root users to view older versions of files and revert changes.

The features include:

Manually create snapshots

Automatically create snapshots, e.g. with YaST and zypp

Automatically create timeline of snapshots

Show and revert changes between snapshots

Works with btrfs, ext4 (discontinued) and thin-provisioned LVM volumes

Supports Access Control Lists and Extended Attributes

Automatic cleanup of old snapshots

Command line interface

D-Bus interface

PAM module to create snapshots during login and logout

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