vim /etc/rc.d/rc.local
#这个文件就是liunx启动，自定放脚本的命令或者脚本
# Figure I added a custom script, attention to the recommendations after the script plus "&", added & script is run in the background in the last line, if it is not running in the background, script, there are an infinite loop, stuck in an endless loop open opportunity
Script content 
# realize the role of the script, listening udp 9 port, packets received on the implementation of the shutdown command