一、在centos环境下安装下载并安装nginx，由于nginx需要依赖一些环境才能安装，主要依赖g++、gcc、openssl-devel、pcre-devel和zlib-devel这些环境，首先得先安装这些

yum install gcc-c++

yum install pcre pcre-devel

yum install zlib zlib-devel

yum install openssl openssl--devel

这些依赖环境安装好了之后就需要检测系统是否已经安装了nginx应用

find / -name "nginx*" 

查找根目录下以nginx开头的文件或者文件夹所有内容，如果没有之后可以进行下载安装nginx

wget http://nginx.org/download/nginx-1.12.2.tar.gz

下载之后解压到当前文件

tar -zxvf nginx-1.12.2.tar.gz 

进入文件夹执行编译安装nginx

make PREFIX=/usr/local/nginx install

安装执行之后可以查找nginx安装位置

whereis nginx

二、成功安装nginx之后可以进入安装目录下执行并启动nginx

进入安装nginx目录

cd /usr/local/sbin/

启动nginx服务

./nginx



查看nginx应用启动详情

ps aux | grep nginx

三、配置nginx开机自启动

进入到/etc/init.d/目录下，创建文件nginx

cd /etc/init.d/

vim nginx

nginx文件具体配置信息如下：

#!/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        # 你的nginx真实启动文件路径

nginx_config=/usr/local/nginx/conf/nginx.conf    # nginx相关配置文件路径

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

保存nginx文件并赋权

chmod 755 nginx

将nginx权限设置为自己可以read、write、exec，其他用户只能有read、exec权限，没有write权限

为nginx加上service相关命令权限

chkconfig --add nginx

chkconfig nginx on

开启nginx的service命令

四、校验nginx的service命令是否成功

service nginx start 执行不报错表示nginx已经启动

重启centos服务器再次验证是否nginx已经启动

重启之前service nginx stop停止nginx服务，之后执行reboot，开机之后执行ps aux | grep nginx如果后台显示nginx已经启动，那么表示nginx的安装和开机自启动已经成功配置

本文章旨在记录自己的平时学习过程，有不正确的和值得改进的真诚希望园友提出意见或建议，一起学习一起进步。