以下是我的问题：使用我的两个 Ubuntu 设备，我无法从互联网获取数据。我可以成功 ping 我的路由器，但 ping 其他 IP（如 8.8.8.8）不起作用。我通过 LAN 连接。
问题只出现在我目前使用的网络上，在其他网络上则一切正常。此外，在当前网络中，所有其他设备（Windows、Android）都可以连接到互联网。
您知道问题可能出在哪里吗？这两台设备的 Ubuntu 版本分别为 16 和 18。
以下是来自我的 ubuntu 16 设备的一些信息：
gnoasti@jetson-flashing-machine:~$ nmcli device show
GENERAL.DEVICE: enp2s0
GENERAL.TYPE: ethernet
GENERAL.HWADDR: E8:03:9A:0E:DC:2C
GENERAL.MTU: 1500
GENERAL.STATE: 100 (connected)
GENERAL.CONNECTION: Wired connection 1
GENERAL.CON-PATH: /org/freedesktop/NetworkManager/ActiveConnection/0
WIRED-PROPERTIES.CARRIER: on
IP4.ADDRESS[1]: 169.254.0.29/24
IP4.GATEWAY: 169.254.0.1
IP4.DNS[1]: 169.254.0.1
IP6.ADDRESS[1]: fe80::e06d:31c0:adc3:a8e5/64
IP6.GATEWAY:
GENERAL.DEVICE: wlp1s0
GENERAL.TYPE: wifi
GENERAL.HWADDR: C4:85:08:68:8E:4A
GENERAL.MTU: 0
GENERAL.STATE: 30 (disconnected)
GENERAL.CONNECTION: --
GENERAL.CON-PATH: --
GENERAL.DEVICE: lo
GENERAL.TYPE: loopback
GENERAL.HWADDR: 00:00:00:00:00:00
GENERAL.MTU: 65536
GENERAL.STATE: 10 (unmanaged)
GENERAL.CONNECTION: --
GENERAL.CON-PATH: --
IP4.ADDRESS[1]: 127.0.0.1/8
IP4.GATEWAY:
IP6.ADDRESS[1]: ::1/128
IP6.GATEWAY:
gnoasti@jetson-flashing-machine:~$ route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
0.0.0.0 169.254.0.1 0.0.0.0 UG 100 0 0 enp2s0
169.254.0.0 0.0.0.0 255.255.255.0 U 100 0 0 enp2s0
gnoasti@jetson-flashing-machine:~$ ping 169.254.0.1
PING 169.254.0.1 (169.254.0.1) 56(84) bytes of data.
64 bytes from 169.254.0.1: icmp_seq=1 ttl=64 time=0.721 ms
64 bytes from 169.254.0.1: icmp_seq=2 ttl=64 time=0.650 ms
^C
--- 169.254.0.1 ping statistics ---
2 packets transmitted, 2 received, 0% packet loss, time 1026ms
rtt min/avg/max/mdev = 0.650/0.685/0.721/0.044 ms
gnoasti@jetson-flashing-machine:~$ ping 8.8.8.8
PING 8.8.8.8 (8.8.8.8) 56(84) bytes of data.
^C
--- 8.8.8.8 ping statistics ---
3 packets transmitted, 0 received, 100% packet loss, time 2040ms
编辑：输出sudo lshw -C network
gnoasti@jetson-flashing-machine:~$ sudo lshw -C network
sudo: unable to resolve host jetson-flashing-machine
*-network
description: Wireless interface
product: Centrino Advanced-N 6235
vendor: Intel Corporation
physical id: 0
bus info: pci@0000:01:00.0
logical name: wlp1s0
version: 24
serial: c4:85:08:68:8e:4a
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
configuration: broadcast=yes driver=iwlwifi driverversion=4.15.0-88-generic firmware=18.168.6.1 latency=0 link=no multicast=yes wireless=IEEE 802.11
resources: irq:29 memory:f0500000-f0501fff
*-network
description: Ethernet interface
product: RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller
vendor: Realtek Semiconductor Co., Ltd.
physical id: 0
bus info: pci@0000:02:00.0
logical name: enp2s0
version: 06
serial: e8:03:9a:0e:dc:2c
size: 100Mbit/s
capacity: 1Gbit/s
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress msix vpd bus_master cap_list ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd 1000bt 1000bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=r8169 driverversion=2.3LK-NAPI duplex=full firmware=rtl8168e-3_0.0.4 03/27/12 ip=169.254.0.29 latency=0 link=yes multicast=yes port=MII speed=100Mbit/s
resources: irq:19 ioport:2000(size=256) memory:f0404000-f0404fff memory:f0400000-f0403fff
提前谢谢您！
答案1
您显示的 IP 地址 (169.254.0.29) 是“链路本地地址”即“仅对主机所连接的网段或广播域内的通信有效”。
所以它永远不会被路由到您当前的网络段之外。
确保您的界面符合以下任一要求：
- 具有有效的网络 IP 地址和网关
- 或者配置为使用 DHCP，并且路由器或网络上的其他设备具有提供 IP 地址的 DHCP 服务器。