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.TH "NGHTTPD" "1" "Jun 17, 2025" "1.66.0" "nghttp2"
.SH NAME
nghttpd \- HTTP/2 server
.SH SYNOPSIS
.sp
\fBnghttpd\fP [OPTION]... <PORT> [<PRIVATE_KEY> <CERT>]
.SH DESCRIPTION
.sp
HTTP/2 server
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.TP
.B <PORT>
Specify listening port number.
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.TP
.B <PRIVATE_KEY>
Set  path  to  server\(aqs private  key.   Required  unless
\fI\%\-\-no\-tls\fP is specified.
.UNINDENT
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.TP
.B <CERT>
Set  path  to  server\(aqs  certificate.   Required  unless
\fI\%\-\-no\-tls\fP is specified.
.UNINDENT
.SH OPTIONS
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.TP
.B \-a, \-\-address=<ADDR>
The address to bind to.  If not specified the default IP
address determined by getaddrinfo is used.
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.TP
.B \-D, \-\-daemon
Run in a background.  If \fI\%\-D\fP is used, the current working
directory is  changed to \(aq\fI/\fP\(aq.  Therefore  if this option
is used, \fI\%\-d\fP option must be specified.
.UNINDENT
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.TP
.B \-V, \-\-verify\-client
The server  sends a client certificate  request.  If the
client did  not return  a certificate, the  handshake is
terminated.   Currently,  this  option just  requests  a
client certificate and does not verify it.
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.TP
.B \-d, \-\-htdocs=<PATH>
Specify document root.  If this option is not specified,
the document root is the current working directory.
.UNINDENT
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.TP
.B \-v, \-\-verbose
Print debug information  such as reception/ transmission
of frames and name/value pairs.
.UNINDENT
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.TP
.B \-\-no\-tls
Disable SSL/TLS.
.UNINDENT
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.TP
.B \-c, \-\-header\-table\-size=<SIZE>
Specify decoder header table size.
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.TP
.B \-\-encoder\-header\-table\-size=<SIZE>
Specify encoder header table size.  The decoder (client)
specifies  the maximum  dynamic table  size it  accepts.
Then the negotiated dynamic table size is the minimum of
this option value and the value which client specified.
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.TP
.B \-\-color
Force colored log output.
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.TP
.B \-p, \-\-push=<PATH>=<PUSH_PATH,...>
Push  resources <PUSH_PATH>s  when <PATH>  is requested.
This option  can be used repeatedly  to specify multiple
push  configurations.    <PATH>  and   <PUSH_PATH>s  are
relative  to   document  root.   See   \fI\%\-\-htdocs\fP  option.
Example: \fI\%\-p\fP/=/foo.png \fI\%\-p\fP/doc=/bar.css
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.B \-b, \-\-padding=<N>
Add at  most <N>  bytes to a  frame payload  as padding.
Specify 0 to disable padding.
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.TP
.B \-m, \-\-max\-concurrent\-streams=<N>
Set the maximum number of  the concurrent streams in one
HTTP/2 session.
.sp
Default: \fB100\fP
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.TP
.B \-n, \-\-workers=<N>
Set the number of worker threads.
.sp
Default: \fB1\fP
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.TP
.B \-e, \-\-error\-gzip
Make error response gzipped.
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.TP
.B \-w, \-\-window\-bits=<N>
Sets the stream level initial window size to 2**<N>\-1.
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.TP
.B \-W, \-\-connection\-window\-bits=<N>
Sets  the  connection  level   initial  window  size  to
2**<N>\-1.
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.TP
.B \-\-dh\-param\-file=<PATH>
Path to file that contains  DH parameters in PEM format.
Without  this   option,  DHE   cipher  suites   are  not
available.
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.TP
.B \-\-early\-response
Start sending response when request HEADERS is received,
rather than complete request is received.
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.TP
.B \-\-trailer=<HEADER>
Add a trailer  header to a response.   <HEADER> must not
include pseudo header field  (header field name starting
with \(aq:\(aq).  The  trailer is sent only if  a response has
body part.  Example: \fI\%\-\-trailer\fP \(aqfoo: bar\(aq.
.UNINDENT
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.TP
.B \-\-hexdump
Display the  incoming traffic in  hexadecimal (Canonical
hex+ASCII display).  If SSL/TLS  is used, decrypted data
are used.
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.TP
.B \-\-echo\-upload
Send back uploaded content if method is POST or PUT.
.UNINDENT
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.TP
.B \-\-mime\-types\-file=<PATH>
Path  to file  that contains  MIME media  types and  the
extensions that represent them.
.sp
Default: \fB/etc/mime.types\fP
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.B \-\-no\-content\-length
Don\(aqt send content\-length header field.
.UNINDENT
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.TP
.B \-\-ktls
Enable ktls.
.UNINDENT
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.TP
.B \-\-version
Display version information and exit.
.UNINDENT
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.TP
.B \-h, \-\-help
Display this help and exit.
.UNINDENT
.sp
The <SIZE> argument is an integer and an optional unit (e.g., 10K is
10 * 1024).  Units are K, M and G (powers of 1024).
.SH SEE ALSO
.sp
\fBnghttp(1)\fP, \fBnghttpx(1)\fP, \fBh2load(1)\fP
.SH AUTHOR
Tatsuhiro Tsujikawa
.SH COPYRIGHT
2012, 2015, 2016, Tatsuhiro Tsujikawa
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