yum方式安裝Nginx，配置Nginx開機自啓動

安裝說明
yum方式安裝Nginx，並配置開機啓動
在新機器上首次安裝nginx以前，須要設置nginx軟件包存儲庫。以後，能夠從存儲庫安裝和更新nginx。

一、安裝utils

yum install yum-utils

二、設置yum存儲庫，建立名爲/etc/yum.repos.d/nginx.repo的文件

[nginx-stable]
name=nginx stable repo
baseurl=http://nginx.org/packages/centos/$releasever/$basearch/
gpgcheck=1
enabled=1
gpgkey=https://nginx.org/keys/nginx_signing.key
module_hotfixes=true
[nginx-mainline]
name=nginx mainline repo
baseurl=http://nginx.org/packages/mainline/centos/$releasever/$basearch/
gpgcheck=1
enabled=0
gpgkey=https://nginx.org/keys/nginx_signing.key
module_hotfixes=true

三、默認狀況下，使用穩定的nginx包庫。若是想使用主線nginx包，運行如下命令:

yum-config-manager --enable nginx-mainline

四、安裝Nginx，

yum install nginx

安裝完成
啓動Nginx：

nginx -v                            查看Nginx版本
whereis nginx                   查看Nginx默認目錄
nginx                                啓動Nginx
nginx -t                             測試命令
nginx -s relaod                 修改nginx.conf以後，能夠重載

Nginx的默認路徑：

Nginx配置路徑：/etc/nginx/
PID目錄：/var/run/nginx.pid
錯誤日誌：/var/log/nginx/error.log
訪問日誌：/var/log/nginx/access.log
默認站點目錄：/usr/share/nginx/html
默認啓動文件: /usr/sbin/nginx

五、添加Nginx到開機啓動

進入到/etc/init.d/目錄下，配置nginx啓動文件：

vim  /etc/init.d/nginx
    #!/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/sbin/nginx                   # nginx真實啓動文件路徑
    nginx_config=/etc/nginx/conf.d/default.conf    #nginx配置文件路徑
    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

六、報錯文件賦予權限：

chmod 755 nginx         
    啓動測試：
    systemctl restart nginx
    systemctl enable nginx
    查看進程：