Dar (disk archiver)

Features

• Support for slices, archives split over multiple files of a particular size.
• Option of deleting files from the system which are removed in the archive.
• Full backup,
• Differential backup,
• Incremental backup,
• Decremental backup,
• Takes care of any type of inode
• Takes care of hard-linked inodes
• Takes care of sparse files,
• Takes care of Linux file Extended Attributes,
• Takes care of Linux file ACL,
• Takes care of Mac OS X file forks,
• Takes care of some filesystem specific attributes like Birthdate of HFS+ filesystem and immutable, data-journaling, secure-deletion, no-tail-merging, undeletable, noatime attributes of ext2/3/4 filesystem.
• Per-file compression with gzip, bzip2, lzo, xz or lzma. An individual can choose not to compress already compressed files based on their filename suffix.
• Fast-extracting of files from anywhere in the archive.
• Fast listing of archive contents through saving the catalogue of files in the archive.
• Optional Blowfish, Twofish, AES, Serpent, Camellia encryption.
• Optional public key encryption and signature
• Live filesystem backup: detects when a file has been modified while it was read for backup and can retry saving it up to a given maximum number of retries
• hash file generated on-fly for each slice, the resulting file is compatible with md5sum or sha1sum, to be able to quickly check each slice's integrity,
• Filesystem independent: it may be used to restore a system to a partition of a different size and/or to a partition with a different filesystem.

  Frontends

• Kdar for Linux, specifically KDE,
• DarGUI for Linux and Windows,
• gdar for Linux.