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duply - a shell frontend to duplicity for simplified backups


duply profile create

duply profile command [options ...]

duply profile command[_command_...] [options ...]


Duply deals as a wrapper for the mighty duplicity magic. It simplifies running duplicity
with cron or on command line by:

- keeping recurring settings in profiles per backup job
- enabling batch operations eg. backup_verify+purge
- executing pre/post scripts (different actions possible
depending on previous or next command or it's exit status)
- precondition checking for flawless duplicity operation

For each backup job one configuration profile must be created. The profile folder will be
stored under ~/.duply/«profile» (where '~' is the current users home directory).

Hint: If the folder /etc/duply exists, the profiles for the superuser root will be
searched and created there.


First time usage (profile creation):

duply <profile> create

General usage in single mode (see EXAMPLES):

duply <profile> <command> [<options> ...]

General usage in batch mode joining commands with '_' (see EXAMPLES):

duply <profile> <command>[[_|+|-]<command>[_|+|-]...] [<options> ...]

For batches the conditional separators can also be written as pseudo commands and(+),
or(-). See SEPARATORS for details.

Non duply options are passed on to duplicity (see OPTIONS). All config parameters can
also be defined in the environment instead.


_ (underscore)
neutral separator

+ (plus sign), _and_
conditional AND; the next command will only be executed if the previous succeeded

- (minus sign), _or_
conditional OR; the next command will only be executed if the previous failed

Example: 'pre+bkp-verify_post' translates to 'pre_and_bkp_or_verify_post'


location for profiles
Indicated by a path or a profile name i.e. sample, which is resolved to ~/.duply/sample
('~' expands to environment variable $HOME).

Superuser root can place profiles under /etc/duply. Simply create the folder manually
before running duply as superuser.

ATTENTION: Already existing profiles in root's home folder will cease to work unless they
are moved to the new location manually.

using profiles
Usually only the profile name will be used:

duply humbug backup

Alternatively a path might be used. This might be useful for quick testing, restoring or
exotic locations. Shell expansion should work as usual:

duply ~/.duplytest/humbug backup

ATTENTION: The path must contain at least one '/', e.g ./test instead of only test.


usage Get usage help text.

and/or Pseudo commands for better batch cmd readability (see SEPARATORS).

create Creates a configuration profile.

backup Backup with pre/post script execution (as batch the same as: pre_bkp_post)

· as full backup if parameter full_if_older matches or no earlier backup is found.

· as incremental backup in all other cases.

bkp As above but without executing pre/post scripts.

full Force full backup.

incr Force incremental backup.

pre Execute only script '<profile>/pre' (for debugging purposes).

post Execute only script '<profile>/post' (for debugging purposes).

list [«age»]
List all files in backup (as it was at age, default: now).

status Print backup sets and chains currently in repository.

verify [«age»] [--compare-data]
List files changed, since age if given.

verifyPath [«rel_path_in_bkp»] [«local_path»] [«age»] [--compare-data]
List changes of a file or folder path in backup compared to a local path, since
age if given.

restore «target_path» [«age»]
Restore the complete backup to target_path (as it was at age).

fetch src_path target_path [«age»]
Fetch single file/folder from backup (as it was at age).

purge [«max_age»] [--force]
List outdated backup archives (older than max_age). Use option --force to
actually delete these files.

purgeFull [«max_full_backups»] [--force]
List outdated backup files. max_full_backups being the number of full backups and
associated incrementals to keep, counting in reverse chronological order. Use
option --force to actually delete these files.

purgeIncr [«max_fulls_with_incrs»] [--force]
List outdated incremental backup files. max_fulls_with_incrs being the number of
full backups which associated incrementals will be kept, counting in reverse
chronological order. Use option --force to actually delete these files.

cleanup [--force]
List broken backup chain files archives (e.g. after unfinished run). Use option
--force to actually delete these files.

version Show version information of duply and needed programs.


Passed to duplicity (see commands: purge, purge-full, purge-incr, cleanup).

Do nothing but print out generated duplicity command lines.

Disable encryption, override profile settings.


For all time related parameters like age, max_age etc. refer to the duplicity manpage for
all available formats. Here some examples:

· 2002-01-25T07:00:00+02:00 (full date time format string)
· 2002/3/5 (date string YYYY/MM/DD)
· 12D (interval, 12 days ago)
· 1h78m (interval, 1 hour 78 minutes ago)


Useful internal duply variables will be readable in the scripts. Some of interest may be


The CMD_* variables were introduced to allow different actions according to the command
the scripts were attached to e.g. 'pre_bkp_post_pre_verify_post' will call the pre script
two times, with CMD_NEXT variable set to 'bkp' on the first and to 'verify' on the second
run. CMD_ERR holds the exit code of the CMD_PREV.


Create profile 'humbug':

duply humbug create

and then edit the resulting conf file of this profile.

Backup 'humbug' now:

duply humbug backup

List available backup sets of profile 'humbug':

duply humbug status

List and delete outdated backups of 'humbug':

duply humbug purge --force

Restore latest backup of 'humbug' to /mnt/restore:

duply humbug restore /mnt/restore

Restore /etc/passwd of 'humbug' from 4 days ago to /root/pw:

duply humbug fetch etc/passwd /root/pw 4D

See man duplicity, section TIME FORMATS for the time format.

A one line batch job on 'humbug' for cron execution:

duply humbug backup_verify_purge --force

Batch job to run a full backup with pre/post scripts:

duply humbug pre_full_post

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