The Duplicati Client connects to Duplicati servers remotely or locally and helps manage them easily through the command-line.
Table of contents
- Why use Duplicati Client?
- External libraries used
- Supported commands
- Setting the server password
- Parameters file
- Export backups
- Create and update backups
Why use Duplicati Client?
Duplicati ships with a CommandLine tool that is capable of doing various actions like backups, restores, and verifying backend data.
However, the Duplicati CommandLine is a separate program. It does not communicate with the Duplicati Server that you interact with when using the web UI.
This plays out in various ways when trying to manually initiate a backup using the CommandLine tool and the Duplicati server not updating it's metadata or even showing that a backup is happening.
Additionally, the CommandLine is stateless in the sense that you need to provide all the relevant information each time you want to run a command. This can be daunting if you just want to initiate a backup run on an existing backup.
The Duplicati Client is a cross platform command-line tool that allows you to interact with the Duplicati Server as if you were using the web UI. It interacts with the same REST API as the web UI, which means it will behave the same and can be used from practically any machine that the web UI can be used from.
Furthermore, this tool makes it easy to write custom scripts for use in cron jobs or ad-hoc tasks. You can simply call the Client from your script or cron job as most options can be provided inline by the script. Even if your Duplicati Server is password protected your scripts can easily log in by using a parametersfile.
External libraries used
Currently the script relies on multiple external libraries:
requests PyYaml python-dateutil
Clone the repo
git clone https://github.com/pectojin/duplicati-client
The client runs on Python 3 and requires the above dependencies
pip3 install -r requirements.txt
For convenience you can symlink the client
sudo ln -s /location/of/git/repo/duplicati_client.py /usr/bin/duc
On UNIX it should automatically attempt to use Python on your system so now you can just call
And you're good to go.
Windows self contained binary
For installation of the Windows self contained binary package I recommend copying it to
C:\Program Files\Duplicati Client and then adding that path to your environment variable path so that you can call
duplicati_client from anywhere in your CLI.
GNU/Linux and macOS self contained binaries
Self contained binaries are also available for Linux and macOS.
These are useful if you cannot or will not install the 3rd party dependencies on your system, or if you experience compatibility problems with your current Python installation.
I recommend copying the binary package to
/opt/duplicati_client on Linux and
/Applications/Duplicati Client on macOS. Then symlink the duplicati_client binary
sudo ln -s /location/of/duplicati_client /usr/bin/duc
To begin log into a server:
duc login https://my.duplicati.server
Then you can list resources
duc list backups
duc get backup 1
Run a backup job
duc run backup 1
Logout when you're done
list List all resources of a given type get display breif information on one or many resources describe display detailed information on a specific resource set set values on resources run run a backup job abort abort a task create create a resource on the server from a YAMl or JSON file update update a resource on the server from a YAMl or JSON file delete delete a backup export export a backup from the server to YAMl or JSON format dismiss dismiss notifications logs display the logs for a given job login log into a Duplicati server logout end the current server session status return information about the current session version print version number config prints the config to stdout verbose Change between normal and verbose mode params import parameters from a YAML file pause pause Duplicati server resume resume paused Duplicati server
Some of the commands are placeholders until I get them implemented.
Setting the server password
It's possible to configure a server password using the
set password command.
duc set password
It will prompt for the new password and configure it on the server. You can also provide it inline using
--password or using a parameters file.
You can disable the password using
duc set password --disable
set password command will remove the
password-protection prompt ("If your machine is in a multi-user environment..."), so if you just want to pre-configure a system to remove that message you can make the
--disable call to remove this message.
Using the command
params you can specify a parameters file. With this file you can provide most of the optional CLI arguments without having to specify them inline when calling your commands.
The parameters file is set once using the
params command and then automatically loaded on each call.
You must create the parameters file yourself. An example of a parameters file:
password: verysecretpassword verbose: True
Then specify that you want to use a parameters file
duc params ~/.config/duplicati-client/parameters.yml
This will load your password, set verbose mode, and allow insecure connections by default when you run a command.
Loaded 3 parameters from ~/.config/duplicati-client/parameters.yml
Then, if you're connecting to a different server, simply override the default password by adding the
--password argument in the CLI.
duc login localhost --password=othersecretpassword
Verbose is an exception to this rule. It applies session wide and can only be toggled by calling the
verbose command, which is nonsensical if you have a parameters file enabling it again.
If you need to disable your parameters file, run
duc params --disable
The export command enables building backup configuration files through the CLI. The Duplicati client will pull the necessary information on the selected backup and construct a configuration file. The configuration file can be exported in either YAML or JSON depending on preference
duc export backup [id]
By default the client will export YAML, but you can manually specify either with
--output. Additionally you can specify the output path with
--output-path. You can also opt to export all backup configs using
The resulting file can then be used to create new backup jobs with the import command. Notice that the JSON output is identical to exporting from the Duplicati Web UI, so if you need interoperability use JSON. The YAML file is only understood by this client for now.
Default options defined in settings are not exported with the job configuration.
Create and update backups
The Create command allows creating backup jobs from a configuration file. Either a JSON file, as exported from the Duplicati Web UI, or a YAML/JSON file exported from this client. Input files are automatically converted into the JSON format that the Duplicati server requires, so it does not matter which format you import from.
duc create backup [path_to_file]
By default metadata will not be imported, but if you'd like to retain the metadata use
The Update command allows updating an existing job from a configuration file.
duc update backup [backup_id] [path_to_file]
Duplicati does not currently allow to update a backup configuration without also overwriting the metadata. If your config file was exported a long time ago with old metadata you may not be interested in this.
--strip-metadata option to remove the metadata before updating the backup config. This way no metadata will be displayed until the backup job has had a chance to run and provide the correct metadata.
Encrypted configuration files are currently not supported.