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AMANDA, the Advanced Maryland Automatic Network Disk Archiver, is a backup system that allows the administrator to set up a single master backup server to back up multiple hosts over network to tape drives/changers or disks or optical media. Amanda uses native dump and/or GNU tar facilities and can back up a large number of workstations running multiple versions of Unix. (from Amanda's Home).

Amanda is licensed under a BSD license. The Community Edition available from any of the download sites (, sourceforge, or zmanda) is completely FOSS.

Resources include:

Enterprise support is available from Zmanda. Zmanda also employs programmers to support and stimulate Amanda's open source community. They have contributed immeasurably to the accelerated development of Amanda in recent years. While Zmanda maintains an Enterprise Edition of Amanda that is commercial, by far the majority of the code they have developed has been contributed back to the Community Edition of Amanda. This especially includes anything related to security, scalability and data formats. Specialized software they have developed related to management GUI and working with closed source platforms (e.g. Windows) and applications (e.g. Exchange) have been considered on a case by case basis. Such developments are allowed by the BSD license and give Zmanda the ability to provide added value to their Enterprise clients while continuing to contribute to the vigor of the open source community.

A particular example of Zmanda's contributions is the quick response of their programmers to Coverity's automated scan of open source software which resulted in Amanda being among the 11 open source projects to be Security Certified in early 2008 (reported by CNET News and the Open Source Security blog, among others).