Projects / unionfs


Unionfs is a stackable unification file system which can appear to merge the contents of several directories (branches), while keeping their physical content separate. Unionfs is useful for unified source tree management, merging the contents of a split CD-ROM, merging separate software package directories, data grids, and more. Unionfs allows any mix of read-only and read-write branches, as well as insertion and deletion of branches anywhere in the fan-out. To maintain Unix semantics, Unionfs handles elimination of duplicates, partial-error conditions, and more.

Operating Systems

Recent releases

  •  02 Mar 2005 17:10

    No changes have been submitted for this release.

    Recent comments

    13 Jan 2007 23:50 tomasd

    unionfs is deprecated
    Even if the development of unionfs continues, it's deprecated. Use aufs instead, which is a re-implemented and re-designed unionfs from the scratch. See


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