将Java程序部署成网页服务，部署websocket实现内网穿透

查看日志：

• tail -n 5000 /usr/local/tomcat7/logs/catalina.out > ~/a.log
  
• ssh -p 1202 -t flybird@web.dgchina.com  'tail -n 50 /usr/local/tomcat7/logs/catalina.out'

• /usr/local/tomcat7/bin/shutdown.sh
  
• /usr/local/tomcat7/bin/startup.sh
  
• sudo /etc/init.d/tomcat7 restart