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Fabric is a Python library and command-line tool designed to streamline
deploying applications or performing system administration tasks via the SSH
protocol. It provides tools for running arbitrary shell commands (either as a
normal login user, or via ``sudo``), uploading and downloading files, and so
forth. 

Typical use involves defining a "fabfile" (a Python module) containing one or
more functions or tasks which may then be executed by the ``fab`` command-line
tool. Fabric provides extra functionality related to this mode of use, such as
prompting for user input, ensuring certain variables are present in order for
tasks to run, and specifying which host or hosts a specific task connects to by
default.

Fabric may also be used as a standalone library, so that other Python programs
needing a simple API on top of SSH or SCP may import and utilize specific
pieces of functionality.