1.已连接网络但无法访问互联网。
2.能连接无线网，能ping www.baidu.com通。
3.USB共享上网，能ping DNS，同样不能接连互联网。
初步估计网卡驱动问题，网卡是英特尔3100系列网卡（没有RJ 45接口），求助重新安装驱动，不知道怎么安装，英特尔官方包加壳了解压不了。


03:00.0 Network controller: Intel Corporation Wireless 3160 (rev 93)

        Subsystem: Intel Corporation Dual Band Wireless AC 3160
       
        Flags: bus master, fast devsel, latency 0, IRQ 122

        Memory at 91000000 (64-bit, non-prefetchable) [size=8K]
        Capabilities:
       
        Kernel driver in use: iwlwifi
       
Kernel modules: iwlwifi, wl


lo: flags=73  mtu 65536

     inet 127.0.0.1  netmask 255.0.0.0

     inet6 ::1  prefixlen 128  scopeid 0x10

     loop  txqueuelen 1000  (Local Loopback)
     RX packets 3092  bytes 285464 (278.7 KiB)

     RX errors 0  dropped 0  overruns 0  frame 0

     TX packets 3092  bytes 285464 (278.7 KiB)

     TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

wlp3s0: flags=4163  mtu 1500

    inet 192.168.1.55  netmask 255.255.255.0  broadcast 192.168.1.255

    inet6 2409:8a6c:793e:fcc0:4066:64e1:9442:70e3  prefixlen 64  scopeid 0x0

    inet6 fe80::34f5:4198:9f3e:db21  prefixlen 64  scopeid 0x20

    ether a0:d3:7a:ab:cb:51  txqueuelen 1000  (Ethernet)

    RX packets 1551  bytes 1291821 (1.2 MiB)

    RX errors 0  dropped 0  overruns 0  frame 0

    TX packets 961  bytes 99689 (97.3 KiB)

    TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0