Ubuntu Manpage: caddy - An extensible server platform

Provided by: caddy_2.6.2-6ubuntu0.24.04.2_amd64

NAME

       caddy - An extensible server platform

SYNOPSIS

       caddy [flags]

DESCRIPTION

Caddy is an extensible server platform written in Go.

At its core, Caddy merely manages configuration. Modules are plugged in statically at
compile-time to provide useful functionality. Caddy's standard distribution includes
common modules to serve HTTP, TLS, and PKI applications, including the automation of
certificates.

To run Caddy, use:

- 'caddy run' to run Caddy in the foreground (recommended).
- 'caddy start' to start Caddy in the background; only do this
if you will be keeping the terminal window open until you run
'caddy stop' to close the server.

When Caddy is started, it opens a locally-bound administrative socket to which
configuration can be POSTed via a restful HTTP API (see https://caddyserver.com/docs/api).

Caddy's native configuration format is JSON. However, config adapters can be used to
convert other config formats to JSON when Caddy receives its configuration. The Caddyfile
is a built-in config adapter that is popular for hand-written configurations due to its
straightforward syntax (see https://caddyserver.com/docs/caddyfile). Many third-party
adapters are available (see https://caddyserver.com/docs/config-adapters). Use 'caddy
adapt' to see how a config translates to JSON.

For convenience, the CLI can act as an HTTP client to give Caddy its initial configuration
for you. If a file named Caddyfile is in the current working directory, it will do this
automatically. Otherwise, you can use the --config flag to specify the path to a config
file.

Some special-purpose subcommands build and load a configuration file for you directly from
command line input; for example:

- caddy file-server
- caddy reverse-proxy
- caddy respond

These commands disable the administration endpoint because their configuration is
specified solely on the command line.

In general, the most common way to run Caddy is simply:

$ caddy run

Or, with a configuration file:

$ caddy run --config caddy.json

If running interactively in a terminal, running Caddy in the background may be more
convenient:

$ caddy start
$ caddy stop

This allows you to run other commands while Caddy stays running. Be sure to stop Caddy
before you close the terminal!

Depending on the system, Caddy may need permission to bind to low ports. One way to do
this on Linux is to use setcap:

$ sudo setcap cap_net_bind_service=+ep $(which caddy)

Remember to run that command again after replacing the binary.

See the Caddy website for tutorials, configuration structure, syntax, and module
documentation: https://caddyserver.com/docs/

Custom Caddy builds are available on the Caddy download page at:
https://caddyserver.com/download

The xcaddy command can be used to build Caddy from source with or without additional
plugins: https://github.com/caddyserver/xcaddy

Where possible, Caddy should be installed using officially-supported package installers:
https://caddyserver.com/docs/install

Instructions for running Caddy in production are also available:
https://caddyserver.com/docs/running

OPTIONS

       -h, --help[=false]      help for caddy

EXAMPLE

         $ caddy run
         $ caddy run --config caddy.json
         $ caddy reload --config caddy.json
         $ caddy stop

HISTORY