networking - Wired connection failed after upgrade to Ubuntu 14.04 - Ask Ubuntu


my system updated 12 14.04 today.
executed apt-get upgrade fixed broken gui
however, wired connection failed after that.

ubuntu keeps trying connect internet , fails with:

disconnected - offline" shows continuously. 

here's information reference.

$ ifconfig eth0      link encap:ethernet  hwaddr e0:3f:49:e6:ff:64             inet6 addr: fe80::e23f:49ff:fee6:ff64/64 scope:link           broadcast running multicast  mtu:1500  metric:1           rx packets:0 errors:0 dropped:0 overruns:0 frame:0           tx packets:325 errors:0 dropped:0 overruns:0 carrier:0           collisions:0 txqueuelen:1000            rx bytes:0 (0.0 b)  tx bytes:64499 (64.4 kb)           interrupt:20 memory:f7c00000-f7c20000   lo        link encap:local loopback             inet addr:127.0.0.1  mask:255.0.0.0           inet6 addr: ::1/128 scope:host           loopback running  mtu:65536  metric:1           rx packets:288 errors:0 dropped:0 overruns:0 frame:0           tx packets:288 errors:0 dropped:0 overruns:0 carrier:0           collisions:0 txqueuelen:0            rx bytes:69793 (69.7 kb)  tx bytes:69793 (69.7 kb)   $ sudo lshw -c network   *-network                       description: ethernet interface        product: ethernet connection i217-v        vendor: intel corporation        physical id: 19        bus info: pci@0000:00:19.0        logical name: eth0        version: 05        serial: e0:3f:49:e6:ff:64        size: 10mbit/s        capacity: 1gbit/s        width: 32 bits        clock: 33mhz        capabilities: pm msi bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation        configuration: autonegotiation=on broadcast=yes driver=e1000e driverversion=2.3.2-k duplex=full firmware=0.13-4 latency=0 link=yes multicast=yes port=twisted pair speed=10mbit/s        resources: irq:43 memory:f7c00000-f7c1ffff memory:f7c3d000-f7c3dfff ioport:f080(size=32)   $ route -n kernel ip routing table destination     gateway         genmask         flags metric ref    use iface   $ ping -c4 www.google.com ping: unknown host www.google.com 

how can fix it?

here updated information.

$ cat /etc/network/interfaces iface lo inet loopback  $ ping 8.8.8.8 connect: network unreachable  $ nmcli c list name                      uuid                                   type              timestamp-real                     nameofconnection          34b17d84-0ff5-4f79-9432-6c3cecc65846   802-11-wireless   never                              wired connection 1        35545dbf-7dd6-4f28-bb3e-a8016a5bd3e4   802-3-ethernet    tue 08 nov 2016 08:24:56 pm cst   

note : please ignore wireless connection part, cannot use right now.


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