BORG-MOUNT(1) borg backup tool BORG-MOUNT(1)
NAME
borg-mount - Mount archive or an entire repository as a FUSE filesystem
SYNOPSIS
borg [common options] mount [options] REPOSITORY_OR_ARCHIVE MOUNTPOINT
[PATH...]
DESCRIPTION
This command mounts an archive as a FUSE filesystem. This can be useful
for browsing an archive or restoring individual files. Unless the
--foreground option is given the command will run in the background un-
til the filesystem is umounted.
The command borgfs provides a wrapper for borg mount. This can also be
used in fstab entries: /path/to/repo /mnt/point fuse.borgfs de-
faults,noauto 0 0
To allow a regular user to use fstab entries, add the user option:
/path/to/repo /mnt/point fuse.borgfs defaults,noauto,user 0 0
For FUSE configuration and mount options, see the mount.fuse(8) manual
page.
Borg's default behavior is to use the archived user and group names of
each file and map them to the system's respective user and group ids.
Alternatively, using numeric-ids will instead use the archived user and
group ids without any mapping.
The uid and gid mount options (implemented by Borg) can be used to
override the user and group ids of all files (i.e., borg mount -o
uid=1000,gid=1000).
The man page references user_id and group_id mount options (implemented
by fuse) which specify the user and group id of the mount owner (aka,
the user who does the mounting). It is set automatically by libfuse (or
the filesystem if libfuse is not used). However, you should not specify
these manually. Unlike the uid and gid mount options which affect all
files, user_id and group_id affect the user and group id of the mounted
(base) directory.
Additional mount options supported by borg:
• versions: when used with a repository mount, this gives a merged,
versioned view of the files in the archives. EXPERIMENTAL, layout may
change in future.
• allow_damaged_files: by default damaged files (where missing chunks
were replaced with runs of zeros by borg check --repair) are not
readable and return EIO (I/O error). Set this option to read such
files.
• ignore_permissions: for security reasons the default_permissions
mount option is internally enforced by borg. ignore_permissions can
be given to not enforce default_permissions.
The BORG_MOUNT_DATA_CACHE_ENTRIES environment variable is meant for ad-
vanced users to tweak the performance. It sets the number of cached
data chunks; additional memory usage can be up to ~8 MiB times this
number. The default is the number of CPU cores.
When the daemonized process receives a signal or crashes, it does not
unmount. Unmounting in these cases could cause an active rsync or sim-
ilar process to unintentionally delete data.
When running in the foreground ^C/SIGINT unmounts cleanly, but other
signals or crashes do not.
OPTIONS
See borg-common(1) for common options of Borg commands.
arguments
REPOSITORY_OR_ARCHIVE
repository or archive to mount
MOUNTPOINT
where to mount filesystem
PATH paths to extract; patterns are supported
options
--consider-checkpoints
Show checkpoint archives in the repository contents list (de-
fault: hidden).
-f, --foreground
stay in foreground, do not daemonize
-o Extra mount options
--numeric-owner
deprecated, use --numeric-ids instead
--numeric-ids
use numeric user and group identifiers from archive(s)
Archive filters
-P PREFIX, --prefix PREFIX
only consider archive names starting with this prefix. (depre-
cated)
-a GLOB, --glob-archives GLOB
only consider archive names matching the glob. sh: rules apply,
see "borg help patterns".
--sort-by KEYS
Comma-separated list of sorting keys; valid keys are: timestamp,
name, id; default is: timestamp
--first N
consider first N archives after other filters were applied
--last N
consider last N archives after other filters were applied
Exclusion options
-e PATTERN, --exclude PATTERN
exclude paths matching PATTERN
--exclude-from EXCLUDEFILE
read exclude patterns from EXCLUDEFILE, one per line
--pattern PATTERN
include/exclude paths matching PATTERN
--patterns-from PATTERNFILE
read include/exclude patterns from PATTERNFILE, one per line
--strip-components NUMBER
Remove the specified number of leading path elements. Paths with
fewer elements will be silently skipped.
SEE ALSO
borg-common(1), borg-umount(1), borg-extract(1)
AUTHOR
The Borg Collective
2023-03-22 BORG-MOUNT(1)
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