笔记本电脑 = Linux
RPI=Raspberry Pi
USB 互联网 = 移动网络共享
我可以在计算机上同时安装这两个设备。如果我尝试 ping，则会得到以下结果：
PING 8.8.8.8 (8.8.8.8) 56(84) bytes of data.
64 bytes from 8.8.8.8: icmp_req=1 ttl=43 time=120 ms //USB0 connected ETHO disconnected
64 bytes from 8.8.8.8: icmp_req=2 ttl=43 time=78.7 ms
64 bytes from 8.8.8.8: icmp_req=3 ttl=43 time=88.5 ms
64 bytes from 8.8.8.8: icmp_req=4 ttl=43 time=65.8 ms
64 bytes from 8.8.8.8: icmp_req=5 ttl=43 time=252 ms
From 192.168.0.247 icmp_seq=6 Destination Host Unreachable //USB0 connected ETHO connected
From 192.168.0.247 icmp_seq=7 Destination Host Unreachable
From 192.168.0.247 icmp_seq=8 Destination Host Unreachable
64 bytes from 8.8.8.8: icmp_req=14 ttl=43 time=58.5 ms //USB0 connected ETHO disconnected
64 bytes from 8.8.8.8: icmp_req=15 ttl=43 time=56.4 ms
64 bytes from 8.8.8.8: icmp_req=16 ttl=43 time=74.4 ms
我怎样才能做到这一点，以便当两者都连接时，我仍然可以 ping 到互联网，然后才能从我的 RPI 访问互联网。