• A Web server (HTTP and HTTPS) for
• The libdar library to provide the rich backup feature set of Disk Archive:
• Any backup type: Full, differential, incremental, decremental
• Able to make a binary delta (and this, recursively) to avoid re-saving a modified large file
• Saving all inode types (plain files, directories, char dev, block dev, symlinks, sockets, door inodes...)
• taking care of hard links (on files, char dev, block dev... and even hard-linked symlinks(!)
• handling and restoring sparse files
• Extended Attributes, like MacOS file forks, Linux ACL, SELinux, user attributes...
• A backup can be a single file or many files of given size, called slices
• Large set of compression algorithms available gzip, bzip2, lzo, xz/lzma, zstd, lz4
• Selective compression to avoid compressing already compressed files and provide more robustness to backups
• Strong encryption, with Key Derivation Function, salt, and configurable iteration counter (argon2, SHA512...)
• Hashing per slice computed before the slice is written to disk (md5, sha1, sha512, whirlpool)
• Truncated backup can be repaired
• The table of content, called catalog can be isolated for backup redundancy but also to ease incremental and differential backups
• Very fast restoration of a few files, fetching only the necessary data within possibly petabytes of data
• Supports a sequential read mode suitable to tape media
• Backup merging and sub-setting without the need to restore any data
• Multi-threaded compression and encryption
• and more features... see Dar/libdar home page
• An FTP and SFTP client to avoid bothering with local disk space and backup transfer as well as to ease data restoration
• The ability to set user configurations on local disk and/or downloadable/uploadable through the HTTP/HTTPS session.

Download

All packages are GPG signed by Denis Corbin the Author of Dar, Libdar, Libthreadar and now Webdar.

Source code package and statically linked binaries

in addition to the git repository you can clone from Github, Webdar is provided as signed source tarball package and as statically linked binaries (a single executable of ~8 MiB) for Linux OS on x86_64 and ARM (whatever the distro is). All these artifacts are provided with their signature at:

To build Webdar from the source code, thanks to read the INSTALL file enclosed within the source package.

Distro packages?

Dar/Libdar exists since year 2002 and since then has been taken into consideration by many Distros, like for example:

• Debian
• Suse
• Redhat
• Centos
• RockyLinux
• VoidLinux
• and probably more...

Webdar being a new-born software it may take time before distros consider it and eventually decide to make a package of it. This will also depend on the interest their user will find in Webdar... I have no weight for this decision. And waiting for this possibility, you can still use the statically linked version of Webdar I provide (or compile Webdar yourself which is not complicated). Statically linked version of Webdar only need a Linux system with the CPU type they have been built for (x86_64 and ARM64 for now), they are distro independent.

Documentation

The best approach of Webdar is probably to start following the Tutorial, eventually having a Webdar running beside to experiment, reproduce and explore more broadly the available options.

A high level view of Libdar features
and the Dar/Libdar documentation

Webdar Software Internal Documentation

Stay tuned

For now all communications and exchanges are planned to be provided by the Gitub Discussions