Cyberduck Mountain Duck CLI

Version 63 (modified by dkocher, on Apr 17, 2015 at 7:34:21 PM) (diff)

--throttle option

Cyberduck Help / Howto / Command Line Interface (CLI)

Cyberduck with a command line interface (CLI) is available for Mac, Windows & Linux. It is installed as duck.




Available as a Homebrew package. Use

brew install duck

to install.

Snaphsot Builds
brew install iterate-ch/cyberduck/duck


Download the latest installer package.



Available as a Chocolatey package. Use

choco install duck

to install.

MSI Installer

Download the latest setup.


RPM Package Repository

To add the duck repository to your system you need to put a file duck.repo with following content into /etc/yum.repos.d/.

Snaphsot Builds

Copy and paste

echo -e "[duck-nightly]\n\
gpgcheck=0" | sudo tee /etc/yum.repos.d/duck-snapshot.repo > /dev/null

to add the configuration.

Stable Builds
echo -e "[duck-stable]\n\
gpgcheck=0" | sudo tee /etc/yum.repos.d/duck-stable.repo > /dev/null

To install Cyberduck CLI use

sudo yum install duck

DEB Package Repository

Add the duck repositories to your /etc/apt/sources.list:

deb nightly main
deb stable main

You need to download the GPG public key from to verify the integrity of the packages:

sudo apt-key adv --keyserver --recv-keys FE7097963FEFBE72

Synchronize the repository using

sudo apt-get update

To install or upgrade Cyberduck CLI use

sudo apt-get install duck

Manual installation

Packages can also be found for download.


Run --help to get the option screen.

Usage:duck [options...]

	URLs must be fully qualified. Paths can either denote a remote file (ftps:// or folder ftps:// with a trailing slash.
Supported protocols
ftp	FTP (File Transfer Protocol)
ftps	FTP-SSL (Explicit AUTH TLS)
sftp	SFTP (SSH File Transfer Protocol)
dav	WebDAV (Web-based Distributed Authoring and Versioning)
davs	WebDAV (HTTP/SSL)
swift	Swift (OpenStack Object Storage)
s3	S3 (Amazon Simple Storage Service)
gs	Google Cloud Storage
azure	Windows Azure Storage
rackspace	Rackspace Cloud Files (US)

    --application <path>              External editor application
    --copy <url> <url>                Copy between servers
 -d,--download <url> <[file]>         Download file or folder. Denote a folder with a trailing '/'
 -e,--existing <action>               Transfer action for existing files
                                      	Resume	Append existing files (resume)
                                      	Cancel	 (cancel)
                                      	Rename	Rename transferred files with a timestamp appended to the filename (similar)
                                      	Compare	Skip files that match size, modification date or checksum (compare)
                                      	Rename existing	Rename existing files with timestamp appended to filename (rename)
                                      	Skip	Skip transfer of files that already exist (skip)
                                      	Overwrite	Overwrite all files (overwrite)
    --edit <url>                      Edit file in external editor
 -h,--help                            Print this help
 -i,--identity <private key file>     Selects a file from which the identity (private key) for public key authentication is read
 -l,--list <url>                      List files in remote folder
 -L,--longlist                        Long list format with modification date and permission mask
 -p,--password <password>             Password
 -P,--preserve                        Preserve permissions and modification date for transferred files
 -q,--quiet                           Suppress progress messages
 -r,--retry                           Retry failed connection attempts
    --region <arg>                    Location of bucket or container
    --synchronize <url> <directory>   Synchronize folders
    --throttle <bytes per second>         Throttle bandwidth
 -u,--username <username>             Username
    --upload <url> <file>             Upload file or folder recursively
 -v,--verbose                         Print transcript
 -V,--version                         Show version number and quit
 -y,--assumeyes                           Assume yes for all prompts


The <url> argument for --copy, --download, --upload and --synchronize must be fully qualified URIs with protocol, hostname and absolute remote path such as ftp://<hostname>/<folder>/<file> for a file or ftp://<hostname>/<folder>/ for a directory. For cloud storage providers, reference the target container (aka bucket) name in the URI like s3://bucketname/key.

Generic options


Retry requests with I/O failures once per default. Useful on connection timeout or latency issues.


Print protocol transcript for requests and responses.


You can pass username as part of the URI prepending to the hostname with username@host. Alternatively use the --username option. You can give the password with the --password option or you will be prompted before the connection is opened by the program if no password matching the host is found in your login keychain (OS X) or user configuration shared with Cyberduck (Windows).

Private Key

When connecting with SFTP you can give a file path to a private key with --identity for use with public key authentication.


Uploads with --upload

Glob pattern support for selecting files to transfer

If your shell supports glob expansion you can use a wildcard pattern to select files for upload like duck --upload ftps://<hostname>/directory/ ~/*.jpg.

Use of ~

You can use the tilde to abbreviate the remote path pointing to the remote home folder as in s It will be expanded when constructing absolute paths.

Remote directory listings with --list

Use the -L option to print permission mask and modification date in addition to filename.

Edit with --edit

You can edit remote files with your preferred editor on your local system using the --edit command. Use the optional --application option to specify the absolute path to the external editor you want to use.

Application Support Directory

  • The support directory is ~/.duck/ on Linux and Windows. You can install third party profiles in ~/.duck/profiles/.
  • The support directory is ~/Library/Application Support/Cyberduck on Mac. You can install third party profiles in ~/Library/Application Support/Cyberduck/Profiles.


You can override default preferences by setting environment variables in your shell.

env "" duck

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