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---
c: Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
SPDX-License-Identifier: curl
Long: help
Arg: <subject>
Short: h
Help: Get help for commands
Category: important curl
Added: 4.0
Multi: custom
See-also:
- verbose
Example:
- --help all
- --help --insecure
- --help -f
---
# `--help`
Usage help. Provide help for the subject given as an optional argument.
If no argument is provided, curl displays the most important command line
arguments.
The argument can either be a **category** or a **command line option**. When a
category is provided, curl shows all command line options within the given
category. Specify category `all` to list all available options.
If `category` is specified, curl displays all available help categories.
If the provided subject is instead an existing command line option, specified
either in its short form with a single dash and a single letter, or in the
long form with two dashes and a longer name, curl displays a help text for
that option in the terminal.
The help output is extensive for some options.
If the provided command line option is not known, curl says so.
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