Linux（CentOS）下，下载安装Nginx并配置

1、准备工作
选首先安装这几个软件：GCC，PCRE（Perl Compatible Regular Expression），zlib，OpenSSL。
Nginx是C写的，需要用GCC编译；Nginx的Rewrite和HTTP模块会用到PCRE；Nginx中的Gzip用到zlib；
用命令“# gcc”，查看gcc是否安装；如果出现“gcc: no input files”信息，说明已经安装好了。
否则，就需要用命令“# yum install gcc”，进行安装了！一路可能需要多次输入y，进行确认。
安装好后，可以再用命令“#gcc”测试，或者用命令“# gcc -v”查看其版本号。
同样方法，用如下命令安装PCRE，zlib，OpenSSL（其中devel，是develop开发包的意思）：

# yum install -y pcre pcre-devel
# yum install -y zlib zlib-devel
# yum install -y openssl openssl-devel

2、下载并安装
创建目录（nginx-src）并进去；然后，从官方地址（http://nginx.org/）下载，解压，配置，编译，安装：

# mkdir nginx-src && cd nginx-src
# wget http://nginx.org/download/nginx-1.7.3.tar.gz
# tar xzf nginx-1.7.3.tar.gz
# cd nginx-1.7.3
# ./configure
# make
# make install
# whereis nginx
nginx: /usr/local/nginx

默认的安装路径为：/usr/local/nginx；跳转到其目录下sbin路径下，便可以启动或停止它了。

# ./nginx -h
nginx version: nginx/1.7.3
Usage: nginx [-?hvVtq] [-s signal] [-c filename] [-p prefix] [-g directives]
Options:
  -?,-h         : this help
  -v            : show version and exit
  -V            : show version and configure options then exit
  -t            : test configuration and exit
  -q            : suppress non-error messages during configuration testing
  -s signal     : send signal to a master process: stop, quit, reopen, reload
  -p prefix     : set prefix path (default: /usr/local/nginx/)
  -c filename   : set configuration file (default: conf/nginx.conf)
  -g directives : set global directives out of configuration file

启动：nginx
停止：nginx -s stop

3、添加到系统服务
使用命令“# vi /etc/init.d/nginx”，打开编辑器，输入如下内容：

#!/bin/sh
# chkconfig: 2345 85 15
# Startup script for the nginx Web Server
# description: nginx is a World Wide Web server.
# It is used to serve HTML files and CGI.
# processname: nginx
# pidfile: /usr/local/nginx/logs/nginx.pid
# config: /usr/local/nginx/conf/nginx.conf

PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin
DESC="nginx deamon"
NAME=nginx
DAEMON=/usr/local/nginx/sbin/$NAME
SCRIPTNAME=/etc/init.d/$NAME

test -x $DAEMON || exit 0

d_start(){
  $DAEMON || echo -n "already running"
}

d_stop(){
  $DAEMON -s quit || echo -n "not running"
}


d_reload(){
  $DAEMON -s reload || echo -n "can not reload"
}

case "$1" in
start)
  echo -n "Starting $DESC: $NAME"
  d_start
  echo "."
;;
stop)
  echo -n "Stopping $DESC: $NAME"
  d_stop
  echo "."
;;
reload)
  echo -n "Reloading $DESC conf..."
  d_reload
  echo "reload ."
;;
restart)
  echo -n "Restarting $DESC: $NAME"
  d_stop
  sleep 2
  d_start
  echo "."
;;
*)
  echo "Usage: $ScRIPTNAME {start|stop|reload|restart}" >&2
  exit 3
;;
esac

exit 0

保存退出后，再使用下面的命令，使其可执行；然后，添加配置并查看。
可用chkconfig修改其值，也可用ntsysv工具改变是否自启动。

# chmod +x /etc/init.d/nginx
# chkconfig --add nginx
# chkconfig nginx on/off
# chkconfig --list nginx
nginx 0:off 1:off 2:on 3:on 4:on 5:on 6:off