borg-import-tar - Create a backup archive from a tarball

NAME  SYNOPSIS  DESCRIPTION  OPTIONS  arguments  options  Archive options  SEE ALSO  AUTHOR 


borg-import-tar − Create a backup archive from a tarball


borg [common options] import−tar [options] ARCHIVE TARFILE


This command creates a backup archive from a tarball.

When giving '−' as path, Borg will read a tar stream from standard input.

By default (−−tar−filter=auto) Borg will detect whether the file is compressed based on its file extension and pipe the file through an appropriate filter:

.tar.gz or .tgz: gzip −d

.tar.bz2 or .tbz: bzip2 −d

.tar.xz or .txz: xz −d

.tar.zstd or .tar.zst: zstd −d

.tar.lz4: lz4 −d

Alternatively, a −−tar−filter program may be explicitly specified. It should read compressed data from stdin and output an uncompressed tar stream on stdout.

Most documentation of borg create applies. Note that this command does not support excluding files.

import−tar is a lossy conversion: BSD flags, ACLs, extended attributes (xattrs), atime and ctime are not exported. Timestamp resolution is limited to whole seconds, not the nanosecond resolution otherwise supported by Borg.

A −−sparse option (as found in borg create) is not supported.

import−tar reads POSIX.1−1988 (ustar), POSIX.1−2001 (pax), GNU tar, UNIX V7 tar and SunOS tar with extended attributes.

To import multiple tarballs into a single archive, they can be simply concatenated (e.g. using "cat") into a single file, and imported with an −−ignore−zeros option to skip through the stop markers between them.


See borg−common(1) for common options of Borg commands.



name of archive to create (must be also a valid directory name)


input tar file. "−" to read from stdin instead.



filter program to pipe data through

−s, −−stats

print statistics for the created archive


output verbose list of items (files, dirs, ...)


only display items with the given status characters


output stats as JSON (implies −−stats)


ignore zero−filled blocks in the input tarball

Archive options

−−comment COMMENT

add a comment text to the archive

−−timestamp TIMESTAMP

manually specify the archive creation date/time (UTC, yyyy−mm−ddThh:mm:ss format). alternatively, give a reference file/directory.

−c SECONDS−−checkpoint−interval SECONDS

write checkpoint every SECONDS seconds (Default: 1800)

−−chunker−params PARAMS

specify the chunker parameters (ALGO, CHUNK_MIN_EXP, CHUNK_MAX_EXP, HASH_MASK_BITS, HASH_WINDOW_SIZE). default: buzhash,19,23,21,4095


select compression algorithm, see the output of the "borg help compression" command for details.




The Borg Collective

Updated 2024-01-29 - |