# Déjà Dup > simple backup app for GNOME **Wikidata**: [Q130555797](https://www.wikidata.org/wiki/Q130555797) **Source**: https://4ort.xyz/entity/deja-dup ## Summary Déjà Dup is a simple backup application for GNOME, designed to provide easy and reliable data protection for Unix-like operating systems. It is free software, distributed under terms that allow users to freely run, study, change, and distribute it, with versions available for multiple platforms. ## Key Facts - **Inception**: Déjà Dup was first released on October 16, 2008. - **License**: Free software, distributed under terms allowing users to freely run, study, change, and distribute it. - **Operating System**: Runs on Unix-like operating systems. - **Programming Language**: Written in Vala, a programming language first released in 2006. - **Latest Stable Version**: 49.2 (released on October 1, 2025). - **Part of**: GNOME Circle, a community of developers and contributors. - **Based on**: Duplicity, a popular backup tool. - **Available on**: Flathub, Snap, AUR, and various Linux distributions (e.g., Fedora, Ubuntu, Debian). - **GUI Toolkit**: Built with GTK and libadwaita for a modern interface. - **Build System**: Uses Meson for compilation. ## FAQs ### Q: What is Déjà Dup used for? A: Déjà Dup is a backup application for GNOME that helps users create and manage backups of their files on Unix-like systems. It supports encrypted backups and integrates with cloud storage services. ### Q: Is Déjà Dup free to use? A: Yes, Déjà Dup is free software distributed under terms that allow users to freely run, study, change, and distribute it. ### Q: What platforms does Déjà Dup support? A: Déjà Dup runs on Unix-like operating systems and is available for installation on various Linux distributions, including Fedora, Ubuntu, and Debian, as well as via Flathub and Snap. ### Q: How do I install Déjà Dup? A: Déjà Dup can be installed via package managers on supported Linux distributions (e.g., `sudo apt install deja-dup` on Ubuntu) or from Flathub using the Flathub client. ### Q: Can I contribute to Déjà Dup? A: Yes, Déjà Dup is open-source, and contributions are welcome. You can report issues, submit code, or help with translations on its GitLab repository. ## Why It Matters Déjà Dup plays a crucial role in the GNOME ecosystem by providing a user-friendly backup solution for Linux users. It simplifies the process of creating encrypted backups, protecting users' data from loss or corruption. By being part of the GNOME Circle and distributed under free software licenses, Déjà Dup ensures accessibility and community-driven development. Its integration with popular backup tools like Duplicity and support for multiple platforms make it a reliable choice for users seeking robust data protection. The application's focus on simplicity and security aligns with GNOME's philosophy of providing intuitive tools for everyday computing tasks. ## Notable For - **Part of GNOME Circle**: Déjà Dup is developed as part of the GNOME Circle, a community of developers and contributors working on GNOME-related projects. - **Free Software**: It is distributed under free software licenses, allowing users to freely run, study, change, and distribute it. - **Modern GUI**: Built with GTK and libadwaita, ensuring a contemporary and user-friendly interface. - **Cross-Platform Availability**: Available on multiple Linux distributions and via Flathub and Snap, making it accessible to a wide range of users. - **Encrypted Backups**: Supports encrypted backups, enhancing data security and privacy. ## Body ### Overview Déjà Dup is a backup application designed for the GNOME desktop environment. It was first released on October 16, 2008, and has since become a staple for users seeking a simple yet powerful backup solution. The application is written in Vala, a programming language that prioritizes developer productivity and performance. ### Development and Distribution Déjà Dup is part of the GNOME Circle, a community of developers and contributors working on GNOME-related projects. It is distributed under free software licenses, allowing users to freely run, study, change, and distribute it. The latest stable version, 49.2, was released on October 1, 2025. ### Technical Details Déjà Dup is built with GTK and libadwaita, providing a modern and intuitive user interface. It uses the Meson build system for compilation and is available on multiple platforms, including Unix-like operating systems. The application is based on Duplicity, a popular backup tool, and supports encrypted backups for enhanced security. ### Availability and Installation Déjà Dup can be installed via package managers on supported Linux distributions, such as Fedora, Ubuntu, and Debian. It is also available via Flathub and Snap, making it accessible to users across different platforms. The application's source code is hosted on GitLab, and contributions are welcome from the community. ### Community and Support Déjà Dup has an active community of users and developers. Users can report issues, submit code, or help with translations on the project's GitLab repository. The application also has a dedicated Matrix room for real-time communication and a Discourse forum for discussions. Additionally, users can access privacy policies, terms of service, and donation pages on the official website. ## References 1. [Source](https://gitlab.gnome.org/World/deja-dup/-/releases/47.0) 2. [Source](https://gitlab.gnome.org/World/deja-dup/-/releases/48.4) 3. [Source](https://gitlab.gnome.org/World/deja-dup/-/releases/49.0) 4. [Source](https://gitlab.gnome.org/World/deja-dup/-/releases/49.1) 5. [Source](https://gitlab.gnome.org/World/deja-dup/-/releases/49.2) 6. [Source](https://apps.gnome.org/DejaDup/)