把yum源安裝1.16.1版本的nginx通過service nginx start方式來啓動

本實驗在 CentOS 7 64 位-2 主機上完成

在配置service nginx start方式啓動之前，可通過執行：nginx來啓動nginx，通過執行nginx -s stop來關停nginx，有時候爲了避免麻煩，需把nginx服務加入service管理中來實現開機自啓動，具體實現步驟如下：
1，創建啓動腳本
[root@CentOS7-2 init.d]# 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/local/nginx/sbin/nginx        # 你的nginx真實啓動文件路徑
nginxd=/usr/sbin/nginx
#nginx_config=/usr/local/nginx/conf/nginx.conf    # nginx相關配置文件路徑
nginx_config=/etc/nginx/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

2，賦予執行權限：

chmod 755 /etc/init.d/nginx

3，爲nginx加上service相關命令權限

#加入服務
chkconfig --add nginx
#設置開機自啓動
systemctl enable nginx.service
#查看是否開機自啓動
[root@CentOS7-2 init.d]# systemctl list-unit-files | grep nginx
nginx-debug.service                           disabled
nginx.service                                 enabled 

4，通過service啓動nginx
注意：需關閉已經開啓的nginx：nginx -s stop

 service nginx start
 service nginx stop
 service nginx restart
 或者
 systemctl start nginx.service
 systemctl stop nginx.service
 systemctl status nginx.service

至此，已完成nginx通過service nginx start方式來啓動