Centos下安装并设置nginx开机自启动

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。