自動獲得本機ＩＰ　地址

 # !/bin/sh
      
        
       ip=$(ifconfig eth0 | grep -A1 eth0 | cut -d: -f2 | tail -n1)
       echo "ip: $ip"
          if [ -e "server.properties" ]
              then
                  rm -rf  server.properties
               else
                touch server.properties
         fi
 echo "#localhost ip"  >> server.properties
        echo  " serverip= $ip" >>  server.properties
        echo  "mysql://$ip:3306" >> server.properties
        more server.properties