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#### 帮助文档
```
$ nginx -h
nginx version: openresty/1.5.12.1
Usage: nginx [-?hvVtq] [-s signal] [-c filename] [-p prefix] [-g directives]

Options:
  -?,-h         : this help 					// 帮助命令
  -v            : show version and exit  		// 显示版本并退出
  -V            : show version and configure options then exit 	// 显示版本并配置选项，然后退出
  -t            : test configuration and exit 	// 测试配置并退出
  -q            : suppress non-error messages during configuration testing 	// 在配置测试期间禁止显示非错误消息
  -s signal     : send signal to a master process: stop, quit, reopen, reload 	// 向主进程发送信号：停止、退出、重新打开、重新加载
  -p prefix     : set prefix path (default: /usr/local/openresty/nginx/nginx/nginx/) 	// 设置前缀路径
  -c filename   : set configuration file (default: /etc/nginx/nginx.conf) 	// 设置配置文件
  -g directives : set global directives out of configuration file 		// 从配置文件中设置全局指令
```

#### 测试配置 [ `-t` ]
```
$ sudo nginx -t
```
输出 (`正确`):
```
nginx: the configuration file /etc/nginx/nginx.conf syntax is ok
nginx: configuration file /etc/nginx/nginx.conf test is successful
```

#### 向主进程发送信号 [ `-s` ]
```
# 停止服务
nginx -s stop

# 优雅停止nginx，有连接时会等连接请求完成再杀死worker进程
nginx -s quit

# 重启服务
nginx -s reload

# 重新打开日志文件，一般用于切割日志
nginx -s reopen
```

#### 显示版本 [ `-v` ]
```
$ nginx -v
```
输出:
```
nginx version: openresty/1.5.12.1
```
#### 显示版本并配置选项 [ `-V` ]
```
$ nginx -V
```
输出:
```
nginx version: openresty/1.5.12.1
built by gcc 4.6.3 (Ubuntu/Linaro 4.6.3-1ubuntu5) 
TLS SNI support enabled
configure arguments: --prefix=/usr/local/openresty/nginx/nginx/nginx --with-debug --add-module=../ngx_devel_kit-0.2.19 --add-module=../echo-nginx-module-0.53 --add-module=../xss-nginx-module-0.04 --add-module=../ngx_coolkit-0.2rc1 --add-module=../set-misc-nginx-module-0.24 --add-module=../form-input-nginx-module-0.08 --add-module=../encrypted-session-nginx-module-0.03 --add-module=../srcache-nginx-module-0.26 --add-module=../ngx_lua-0.9.7 --add-module=../ngx_lua_upstream-0.02 --add-module=../headers-more-nginx-module-0.25 --add-module=../array-var-nginx-module-0.03 --add-module=../memc-nginx-module-0.14 --add-module=../redis2-nginx-module-0.11 --add-module=../redis-nginx-module-0.3.7 --add-module=../auth-request-nginx-module-0.2 --add-module=../rds-json-nginx-module-0.13 --add-module=../rds-csv-nginx-module-0.05 --with-ld-opt='-Wl,-rpath,/usr/local/openresty/nginx/nginx/luajit/lib -Wl,-rpath,/usr/local/openresty/nginx/luajit/lib -Wl,-rpath,/usr/local/openresty/luajit/lib' --sbin-path=/usr/sbin/nginx --conf-path=/etc/nginx/nginx.conf --error-log-path=/var/log/nginx/error.log --http-client-body-temp-path=/var/lib/nginx/body --http-fastcgi-temp-path=/var/lib/nginx/fastcgi --http-log-path=/var/log/nginx/access.log --http-proxy-temp-path=/var/lib/nginx/proxy --http-scgi-temp-path=/var/lib/nginx/scgi --http-uwsgi-temp-path=/var/lib/nginx/uwsgi --lock-path=/var/lock/nginx.lock --pid-path=/run/nginx.pid --with-pcre-jit --with-http_addition_module --with-http_dav_module --with-http_geoip_module --with-http_gzip_static_module --with-http_image_filter_module --with-http_realip_module --with-http_stub_status_module --with-http_ssl_module --with-http_sub_module --with-http_xslt_module --with-ipv6 --with-mail --with-mail_ssl_module
```

#### 将 nginx 加入到 service 中
```
sudo vim /etc/init.d/nginx
```
写入
```
#!/bin/sh

### BEGIN INIT INFO
# Provides:          nginx
# Required-Start:    $local_fs $remote_fs $network $syslog
# Required-Stop:     $local_fs $remote_fs $network $syslog
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: starts the nginx web server
# Description:       starts nginx using start-stop-daemon
### END INIT INFO

PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin
DAEMON=/usr/sbin/nginx
NAME=nginx
DESC=nginx

# Include nginx defaults if available
if [ -f /etc/default/nginx ]; then
	. /etc/default/nginx
fi

test -x $DAEMON || exit 0

set -e

. /lib/lsb/init-functions

test_nginx_config() {
	if $DAEMON -t $DAEMON_OPTS >/dev/null 2>&1; then
		return 0
	else
		$DAEMON -t $DAEMON_OPTS
		return $?
	fi
}

case "$1" in
	start)
		echo -n "Starting $DESC: "
		test_nginx_config
		# Check if the ULIMIT is set in /etc/default/nginx
		if [ -n "$ULIMIT" ]; then
			# Set the ulimits
			ulimit $ULIMIT
		fi
		start-stop-daemon --start --quiet --pidfile /var/run/$NAME.pid \
		    --exec $DAEMON -- $DAEMON_OPTS || true
		echo "$NAME."
		;;

stop)
		echo -n "Stopping $DESC: "
		start-stop-daemon --stop --quiet --pidfile /var/run/$NAME.pid \
		    --exec $DAEMON || true
		echo "$NAME."
		;;

restart|force-reload)
		echo -n "Restarting $DESC: "
		start-stop-daemon --stop --quiet --pidfile \
		    /var/run/$NAME.pid --exec $DAEMON || true
		sleep 1
		test_nginx_config
		start-stop-daemon --start --quiet --pidfile \
		    /var/run/$NAME.pid --exec $DAEMON -- $DAEMON_OPTS || true
		echo "$NAME."
		;;

reload)
		echo -n "Reloading $DESC configuration: "
		test_nginx_config
		start-stop-daemon --stop --signal HUP --quiet --pidfile /var/run/$NAME.pid \
		    --exec $DAEMON || true
		echo "$NAME."
		;;

configtest|testconfig)
		echo -n "Testing $DESC configuration: "
		if test_nginx_config; then
			echo "$NAME."
		else
			exit $?
		fi
		;;

status)
		status_of_proc -p /var/run/$NAME.pid "$DAEMON" nginx && exit 0 || exit $?
		;;
	*)
		echo "Usage: $NAME {start|stop|restart|reload|force-reload|status|configtest}" >&2
		exit 1
		;;
esac

nginx常用命令

一克字符 | EchoStr