Lethe
Lethe: Open-source reboot rollback for Debian-derived Linux, with daemon operation and limited management. Ranked #22 of 24 in System Restore Software by our editors (5.8/10); pricing: Free plan; best for debian-based Linux reboot discard.
At a glance
- Editor score5.8 / 10
- PricingFree plan
- Best forDebian-based Linux reboot discard
- Free planYes
- Paid fromFree
- Restore triggerReboot
- Founded2009
- Facts checked20 Oct 2026
Where it wins
- AUFS overlays freeze one or more Linux partitions
- Reboot discards session changes from a temporary tmpfs layer
- Debian package configures GRUB and initramfs at installation
Where it doesn't
- Linux-only deployment limits cross-platform use
- Non-interactive daemon offers limited session management
- Beta project with latest package version 0.34
Our verdict on Lethe
Lethe is an open-source partition-freezing utility for Debian-derived GNU/Linux systems. It is designed for shared computers such as laboratories, classrooms and public-access workstations where each reboot should return the machine to its prior state. Lethe freezes one or more Linux partitions with AUFS overlays, mounts the underlying root filesystem read-only, and places session changes in a temporary tmpfs layer. After reboot, those transient changes are discarded and the original system state is presented again. Supported distributions include Debian, Ubuntu and Lihuen.
The software is free and self-hosted, with no paid tiers described. Installation uses a Debian package and includes GRUB and initramfs configuration for boot-time integration. Once configured, Lethe operates as a non-interactive daemon rather than as a session-by-session management console. That architecture suits administrators who want automatic rollback at reboot, while the system-level scope means changes to the protected environment are treated alike instead of being selectively restored. The published feature set centers on partition freezing, read-only mounting and temporary storage rather than broader endpoint administration.
Lethe’s narrow platform scope is an important selection factor: deployment is for Linux, specifically Debian-derived systems, and the listed ecosystem does not extend to Windows or macOS. Support is community-based, and the project is listed as Beta with a last recorded update in 2016 and version 0.34 as the latest downloadable package. Choose Lethe when open-source, reboot-triggered system rollback on Debian-based shared machines is the priority and a daemon model is acceptable. Choose another system restore product when cross-platform coverage, interactive controls, or a more recently updated project is required.
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Lethe pricing
Lethe fact sheet
| Free plan | Yes |
|---|---|
| Paid from | Free |
| Restore trigger | Reboot |
| Rollback scope | System |
| Protected devices | Not verified |
| Platform support | Not verified |
| Kiosk mode | Not verified |
| Classroom controls | Not verified |
| Central management | Not verified |
| Deployment | Self-hosted |
| Platforms | Linux |
| Support | Community |
| Built for | Small business, Mid-market (editorial estimate) |
| Pricing | Free plan |
| Website | sourceforge.net |
| Facts checked | 20 Oct 2026 |
Alternatives to Lethe
- Microsoft System RestoreA free Windows utility for rolling back system changes while preserving personal files.9.1
- Unified Write FilterEnterprise Windows write filtering that resets protected volumes on reboot.9.0
- Phantosys vDiskA centralized virtual-disk rollback system for Windows and Linux fleets.7.9
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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