Encrypted bandwidth-efficient backup using the rsync algorithm

Duplicity backs directories by producing encrypted tar-format volumes and uploading them to a remote or local file server. Because duplicity uses librsync, the incremental archives are space efficient and only record the parts of files that have changed since the last backup. Because duplicity uses GnuPG to encrypt and/or sign these archives, they will be safe from spying and/or modification by the server.

The duplicity package also includes the rdiffdir utility. Rdiffdir is an extension of librsync's rdiff to directories---it can be used to produce signatures and deltas of directories as well as regular files. These signatures and deltas are in GNU tar format.

Duplicity is fairly mature software. As any software, it may still have a few bugs, but will work for normal usage and is in use now for large personal and corporate backups. If you have questions try the mailing list. Bug reports and bug fixes can be entered through the Launchpad project page.

In theory many protocols for connecting to a file server could be supported; so far

Amazon S3

Backblaze B2

DropBox

ftp

GIO

Google Docs

Google Drive

HSI

Hubic

IMAP

local filesystem

Mega.co

Microsoft Azure

Microsoft Onedrive

par2

Rackspace Cloudfiles

rclone

rsync

Skylabel

ssh/scp

SwiftStack

Tahoe-LAFS

WebDAV

have been written. Currently duplicity supports deleted files, full unix permissions, directories, and symbolic links, fifos, and device files, but not hard links.

The current stable 0.8 release is 0.8.16, released September 29, 2020.

See: duplicity-0.8.16 for details and download link

Refer to the Changelog for overview of the recent changes and to GNU Changelog for the gory details from Bazaar.

The last stable 0.7 release is 0.7.19, released Apr 19, 2019.

See: duplicity-0.7.19 for details and download link

Refer to the Changelog for overview of the recent changes and to GNU Changelog for the gory details from Bazaar.

Warning: If you are upgrading from your distribution's repository to the tarball version, or from the tarball version to your distributions version, please be sure to remove or purge the distribution's version of duplicity. Failure to do so may result in confusing results since the repository and tarball versions may install in different locations.

Older versions are also available for the budding historians in the downloads area.

There are multiple ways of downloading and installing duplicity:

Source - New home on Gitlab

Stable tarball install - all versions

Daily duplicity PPA - duplicity-develop-git

Stable duplicity PPA - duplicity-release-git

Stable snap builds - sudo snap install duplicity --classic

Latest snap builds - sudo snap install duplicity --classic --edge

Latest pip3 builds - sudo pip3 install duplicity

Michael Terry maintains the deja-dup PPA for deja-dup. Updates to the PPA will sometimes lag behind the above updates, so please be patient.

Edgar Soldin maintains duply (formerly known as ftplicity), a shell front end that simplifies the usage by keeping settings for backup jobs in profiles. It supports pre/post backup scripts and executing multiple commands in a batch mode.

All the code here is GPL'ed (free software). Duplicity is also part of the Fedora, Debian, and Ubuntu distributions of GNU/Linux.

Duplicity requires a POSIX-like operating system. It is best used under GNU/Linux. Refer to the README for the full list of requirements.