borg diff

borg [common options] diff [options] REPO_ARCHIVE1 ARCHIVE2 [PATH...]
positional arguments
  REPO_ARCHIVE1 repository location and ARCHIVE1 name
  ARCHIVE2 ARCHIVE2 name (no repository location allowed)
  PATH paths of items inside the archives to compare; patterns are supported
optional arguments
  --numeric-owner only consider numeric user and group identifiers
  --same-chunker-params Override check of chunker parameters.
  --sort Sort the output lines by file path.

Common options

Exclusion options
  -e PATTERN, --exclude PATTERN exclude paths matching PATTERN
  --exclude-from EXCLUDEFILE read exclude patterns from EXCLUDEFILE, one per line
  --pattern PATTERN experimental: include/exclude paths matching PATTERN
  --patterns-from PATTERNFILE experimental: read include/exclude patterns from PATTERNFILE, one per line
  --exclude-caches exclude directories that contain a CACHEDIR.TAG file (
  --exclude-if-present NAME exclude directories that are tagged by containing a filesystem object with the given NAME
  --keep-exclude-tags, --keep-tag-files if tag objects are specified with --exclude-if-present, don’t omit the tag objects themselves from the backup archive


This command finds differences (file contents, user/group/mode) between archives.

A repository location and an archive name must be specified for REPO_ARCHIVE1. ARCHIVE2 is just another archive name in same repository (no repository location allowed).

For archives created with Borg 1.1 or newer diff automatically detects whether the archives are created with the same chunker params. If so, only chunk IDs are compared, which is very fast.

For archives prior to Borg 1.1 chunk contents are compared by default. If you did not create the archives with different chunker params, pass --same-chunker-params. Note that the chunker params changed from Borg 0.xx to 1.0.

See the output of the “borg help patterns” command for more help on exclude patterns.


$ borg init -e=none testrepo
$ mkdir testdir
$ cd testdir
$ echo asdf > file1
$ dd if=/dev/urandom bs=1M count=4 > file2
$ touch file3
$ borg create ../testrepo::archive1 .

$ chmod a+x file1
$ echo "something" >> file2
$ borg create ../testrepo::archive2 .

$ rm file3
$ touch file4
$ borg create ../testrepo::archive3 .

$ cd ..
$ borg diff testrepo::archive1 archive2
[-rw-r--r-- -> -rwxr-xr-x] file1
   +135 B    -252 B file2

$ borg diff testrepo::archive2 archive3
added           0 B file4
removed         0 B file3

$ borg diff testrepo::archive1 archive3
[-rw-r--r-- -> -rwxr-xr-x] file1
   +135 B    -252 B file2
added           0 B file4
removed         0 B file3