Linux下的Nginx安装(开机自启动)

1.前提

1．在安装Nginx前，需要确保系统安装了g++,gcc, openssl-devel、pcre-devel和zlib-devel软件。安装必须软件：

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

2.Nginx安装

在centos下执行yum search nginx可以查看系统自带的Nginx，执行 yum install nginx可以快捷的安装Nginx。但由于系统自带的Nginx的版本太低，所以一般我们不这么安装。不过在我们执行yum install nginx可以看到Nginx依赖包。

2.1安装Nginx的依赖包

yum install GeoIP gd libXpm libxslt

2.2 安装Nginx

从Nginx的官网（http://nginx.org/en/download.html）下载Nginx的最新版本，这里我们下载的是nginx-1.7.3。

1.上传我们刚下载的nginx的tar包到Linux服务器上，并将tar包移动到/usr/local目录下

mv nginx-1.7.3.tar.gz /usr/local

2.解压安装

进入/usr/local目录下（cd /usr/local）解压Nginx的安装包

tar –zxv nginx-1.7.3.tar.gz

3.Nginx配置

为了方便起见，将nginx-1.7.3重命名为nginx

cd nginx
 ./configure
 make
 make install

2.3验证

查看nginx安装路径（whereis nginx）并启动Nginx（ /usr/local/nginx/sbin/nginx）

whereis nginx
/usr/local/nginx/sbin/nginx

在浏览器输入http://localhost看到nginx的欢迎页。

3.开机自动启动Nginx

这里使用的是编写shell脚本的方式来处理，vi /etc/init.d/nginx输入下面的代码

#!/bin/bash
# nginx Startup script for the Nginx HTTP Server
# it is v.0.0.2 version.
# chkconfig: - 85 15
# description: Nginx is a high-performance web and proxy server.
#              It has a lot of features, but it's not for everyone.
# processname: nginx
# pidfile: /var/run/nginx.pid
# config: /usr/local/nginx/conf/nginx.conf
nginxd=/usr/local/nginx/sbin/nginx
nginx_config=/usr/local/nginx/conf/nginx.conf
nginx_pid=/var/run/nginx.pid
RETVAL=0
prog="nginx"
# Source function library.
. /etc/rc.d/init.d/functions
# Source networking configuration.
. /etc/sysconfig/network
# Check that networking is up.
[ ${NETWORKING} = "no" ] && exit 0
[ -x $nginxd ] || exit 0
# Start nginx daemons functions.
start() {
if [ -e $nginx_pid ];then
   echo "nginx already running...."
   exit 1
fi
   echo -n $"Starting $prog: "
   daemon $nginxd -c ${nginx_config}
   RETVAL=$?
   echo
   [ $RETVAL = 0 ] && touch /var/lock/subsys/nginx
   return $RETVAL
}
# Stop nginx daemons functions.
stop() {
        echo -n $"Stopping $prog: "
        killproc $nginxd
        RETVAL=$?
        echo
        [ $RETVAL = 0 ] && rm -f /var/lock/subsys/nginx /var/run/nginx.pid
}
# reload nginx service functions.
reload() {
    echo -n $"Reloading $prog: "
    #kill -HUP `cat ${nginx_pid}`
    killproc $nginxd -HUP
    RETVAL=$?
    echo
}
# See how we were called.
case "$1" in
start)
        start
        ;;
stop)
        stop
        ;;
reload)
        reload
        ;;
restart)
        stop
        start
        ;;
status)
        status $prog
        RETVAL=$?
        ;;
*)
        echo $"Usage: $prog {start|stop|restart|reload|status|help}"
        exit 1
esac
exit $RETVAL

:wq  保存并退出
设置文件的访问权限
chmod a+x /etc/init.d/nginx   (a+x ==> all user can execute  所有用户可执行) 

chmod a+x /etc/init.d/nginx 

这样在控制台就很容易的操作nginx了：查看Nginx当前状态、启动Nginx、停止Nginx、重启Nginx…

/etc/init.d/nginx status
/etc/init.d/nginx start
/etc/init.d/nginx stop
/etc/init.d/nginx restart

同样的修改了nginx的配置文件nginx.conf，也可以使用上面的命令重新加载新的配置文件并运行，可以将此命令加入到rc.local文件中，这样开机的时候nginx就默认启动了

vi /etc/rc.local

加入一行  /etc/init.d/nginx start    保存并退出，下次重启会生效。