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Edit By Duplicity implements a traditional backup scheme, where the initial archive contains all information (full backup) and in the future only the changed information is added. However, here are some advantages it may have over other similar solutions: - Easy to use: Although duplicity is a command-line utility, the semantics are relative simply. To take a basic example, this command: duplicity /usr scp://host.net/target_dir backs up the /usr directory to the remost host host.net via scp. - Encrypted and signed archives: The archives that duplicity produces can be encrypted and signed using GnuPG, the standard for free software cryptology. The remote location will not be able to infer much about the backups other than their size and when they are uploaded. Also, if the archives are modified on the remote side, this will be detected when restoring. - Bandwidth and space efficient: Duplicity uses the rsync Algorithm so only the changed parts of files are sent to the archive when doing an Incremental Backup. For instance, if a long log file increases by just a few lines of text, a small diff will be sent to and saved in the archive. Other backup programs may save a complete copy of the file. - Standard file format: Athough archive data will be encrypted, inside it is in standard GNU-tar format archives. A full backup contains normal tarballs, and incremental backups are tar archives of new files and the deltas from previous backups. The deltas are in the format produced by librsync's command-line utility rdiff.

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