nginx/docs/man/nginx.8

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.\" Copyright (c) 2010 Sergey A. Osokin
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.Dd August 10, 2011
.Dt NGINX 8
.Os
.Sh NAME
.Nm nginx
.Nd "HTTP and reverse proxy server, mail proxy server"
.Sh SYNOPSIS
.Nm
.Op Fl hqtvV?
.Op Fl c Ar file
.Op Fl g Ar directives
.Op Fl p Ar prefix
.Op Fl s Ar signal
.Sh DESCRIPTION
The
.Nm
(spelled
.Dq engine x )
is an HTTP and reverse proxy server, as well as a mail proxy server.
The
.Nm
is known for its high performance, stability, rich feature set, simple
configuration, and low resource consumption.
.Pp
The options are as follows:
.Bl -tag -width ".Fl d Ar directives"
.It Fl ?\& | h
Print help.
.It Fl c Ar file
Use an alternative configuration
.Ar file .
.It Fl g Ar directives
Set global configuration directives.
See
.Sx EXAMPLES
for details.
.It Fl p Ar prefix
Set prefix path.
Default value is
.Pa %%PREFIX%% .
.It Fl q
Suppress non-error messages during configuration testing.
.It Fl s Ar signal
Send signal to the master process.
The argument
.Ar signal
can be one of:
.Cm stop , quit , reopen , reload .
The following table shows the corresponding system signals.
.Pp
.Bl -tag -width ".It Cm reopen" -compact
.It Cm stop
.Dv SIGTERM
.It Cm quit
.Dv SIGQUIT
.It Cm reopen
.Dv SIGUSR1
.It Cm reload
.Dv SIGHUP
.El
.It Fl t
Don't run, just test the configuration file.
The
.Nm
checks configuration for correct syntax and then tries to open files
referred in configuration.
.It Fl v
Print
.Nm
version.
.It Fl V
Print
.Nm
version, compiler version and
.Pa configure
script parameters.
.El
.Sh SIGNALS
The master process of
.Nm
can handle the following signals.
.Pp
.Bl -tag -width ".It Dv SIGINT , SIGTERM" -compact
.It Dv SIGINT , SIGTERM
Shut down quickly.
.It Dv SIGHUP
Reload configuration, start the new worker process with a new
configuration, gracefully shut down old worker processes.
.It Dv SIGQUIT
Shut down gracefully.
.It Dv SIGUSR1
Reopen log files.
.It Dv SIGUSR2
Upgrade
.Nm
executable on the fly.
.It Dv SIGWINCH
Shut down gracefully worker processes.
.El
.Pp
While there's no need to explicitly control worker processes normally,
they support some signals, too:
.Pp
.Bl -tag -width ".It Dv SIGINT , SIGTERM" -compact
.It Dv SIGTERM
Shut down quickly.
.It Dv SIGQUIT
Shut down gracefully.
.It Dv SIGUSR1
Reopen log files.
.El
.Sh DEBUGGING LOG
To enable a debugging log, reconfigure
.Nm
to build with debugging:
.Pp
.Dl "./configure --with-debug ..."
.Pp
and then set the
.Cm debug
level of the
.Va error_log :
.Pp
.Dl "error_log /path/to/log debug;"
.Pp
It is also possible to enable the debugging for some IP address:
.Bd -literal -offset indent
events {
	debug_connection 127.0.0.1;
}
.Ed
.Sh FILES
.Bl -tag -width indent -compact
.It Pa %%PID_PATH%%
Contains the process ID of the
.Nm
listening for connections.
The content of this file is not sensitive; it can be world-readable.
.It Pa %%CONF_PATH%%
Main configuration file.
.It Pa %%ERROR_LOG_PATH%%
Error log file.
.El
.Sh EXIT STATUS
Exit status is 0 on success, or 1 if the command fails.
.Sh EXAMPLES
.Bd -literal
nginx -t -c ~/mynginx.conf -g "pid /var/run/mynginx.pid; worker_processes 2;"
.Ed
Test configuration file
.Pa ~/mynginx.conf
with global directives for PID and quantity of worker processes.
.Sh SEE ALSO
.\"Xr nginx.conf 5
.\"Pp
Documentation at
.Pa http://nginx.org/
and
.Pa http://sysoev.ru/nginx/ .
.Pp
For questions and technical support, please refer to
.Pa http://nginx.org/en/support.html .
.Sh HISTORY
Development of
.Nm
started in 2002, with the first public release on October 4, 2004.
.Sh AUTHORS
.An -nosplit
.An Igor Sysoev Aq igor@sysoev.ru
.Pp
This manual page was written by
.An Sergey A. Osokin Aq osa@FreeBSD.org.ru
as a result of compilation of many
.Nm
documents all over the world.