openSUSE/snapper

Snapper is a tool for Linux filesystem snapshot management that enables users to view older versions of files and revert system modifications.

The tool addresses the need to recover from unwanted changes to a system by creating snapshots of the filesystem state and allowing comparison and reversal of differences between them. Both root and non-root users can access this functionality, making it suitable for systems where multiple users need undo capabilities. The approach works by managing snapshots at the filesystem level, providing a mechanism to inspect what changed between points in time and selectively restore those changes.

Snapper is most appropriate for Linux environments where filesystem-level recovery is needed, particularly in SUSE Linux Enterprise and openSUSE distributions where it integrates most naturally. The tool suits administrators and users who want granular control over system state recovery without requiring full system backups or restores. It is particularly valuable in development and testing environments where the ability to quickly revert experimental changes is important.

The project maintains an organized development process with unit tests in the testsuite directory and additional real-execution tests in testsuite-real that can validate actual snapper commands in isolated environments. Release procedures are formalized, requiring changelog updates, test verification, Git tagging with semantic versioning, and coordinated distribution across multiple Linux distributions through the openSUSE Build Service. Documentation is actively maintained alongside code changes, with both man pages and the project website updated when functionality evolves. The project supports building across multiple distributions including SUSE Linux Enterprise, openSUSE, and RHEL-based systems, with corresponding metadata files maintained for each target platform.