Duplicity (software)

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Initial releaseAugust 26, 2002; 21 years ago (2002-08-26)[1]
Stable release
2.1.4 / 20 October 2023; 4 months ago (20 October 2023)
Written inPython
Operating systemCross-platform (POSIX)
TypeBackup software
LicenseGNU General Public License

Duplicity, graphical interface known as Déjà Dup, is a software suite that provides encrypted, digitally signed, versioned, local or remote backup of files requiring little of the remote server.[2][3] Released under the terms of the GNU General Public License (GPL), Duplicity is free software.

Duplicity operates under a scheme where the first archive is a complete (full) backup, and subsequent (incremental) backups only add differences from the latest full or incremental backup.[4] Chains consisting of a full backup and a series of incremental backups can be recovered to the point in time that any of the incremental steps were taken. If any of the incremental backups are missing, then the incremental backups following it cannot be reconstructed. It does this using GnuPG, librsync, tar, and rdiff.[2] To transmit data to the backup repository, it can use SSH/SCP/SFTP, local file access, rsync, FTP, Amazon S3,[5] Google Cloud Storage,[6] Rackspace Cloud Files,[7] and others.

Duplicity works best under Unix-like operating systems (such as Linux, BSD, and Mac OS X),[8] though it can be used with Windows under Cygwin or the Windows Subsystem for Linux. Currently duplicity supports deleted files, full Unix permissions, directories, and symbolic links, fifos, and device files, but not hard links.

Déjà Dup is a graphical user interface for Duplicity.[9]

See also[edit]


  1. ^ Duplicity changelog
  2. ^ a b Linux Journal: An Automated Reliable Backup Solution.
  3. ^ "Taking smart backups with Duplicity". 10 July 2017.
  4. ^ Duplicity Website: Features.
  5. ^ Bash Script: Incremental Encrypted Backups with Duplicity (Amazon S3).
  6. ^ Change log of version 0.6.22.
  7. ^ A fork of dt-s3-backup to use with Rackspace Cloud Files.
  8. ^ Installing Duplicity on OS/X 10.5 (Leopard).
  9. ^ Buzdar, Karim (27 May 2019). "How to Backup Files with Déjà Dup and Duplicity on Ubuntu 18.04 LTS". VITUX.

External links[edit]