Estas são saídas de alguns comandos úteis: - Que isso ajude ...
1 .- > ifconfig saída - >
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:65536 Metric:1
RX packets:9262 errors:0 dropped:0 overruns:0 frame:0
TX packets:9262 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:845156 (845.1 KB) TX bytes:845156 (845.1 KB)
wlan0 Link encap:Ethernet HWaddr e0:ca:94:3e:ec:ef
inet addr:192.168.43.229 Bcast:192.168.43.255 Mask:255.255.255.0
inet6 addr: fe80::e2ca:94ff:fe3e:ecef/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:223666 errors:0 dropped:0 overruns:0 frame:217706
TX packets:180946 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:243037937 (243.0 MB) TX bytes:16583971 (16.5 MB)
Interrupt:16
(2). cat /etc/nework/interfaces :->
output--> # interfaces(5) file used by ifup(8) and ifdown(8)
auto lo
iface lo inet loopback
(3). ifup eth0 :->
output--> Ignoring unknown interface eth0=eth0.
(4) lspci -nn :->
output-->
00:00.0 Host bridge [0600]: Intel Corporation 2nd Generation CoreProcessor
Family DRAM Controller [8086:0104] (rev 09)
00:02.0 VGA compatible controller [0300]: Intel Corporation 2nd Generation
C ore Processor Family Integrated Graphics Controller [8086:0116] (rev 09)
00:16.0 Communication controller [0780]: Intel Corporation 6 Series/C200 Series Chipset Family MEI Controller #1 [8086:1c3a] (rev 04)
00:1a.0 USB controller [0c03]: Intel Corporation 6 Series/C200 Series Chipset Family USB Enhanced Host Controller #2 [8086:1c2d] (rev 04)
00:1b.0 Audio device [0403]: Intel Corporation 6 Series/C200 Series Chipset Family High Definition Audio Controller [8086:1c20] (rev 04)
00:1c.0 PCI bridge [0604]: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 1 [8086:1c10] (rev b4)
00:1d.0 USB controller [0c03]: Intel Corporation 6 Series/C200 Series Chipset Family USB Enhanced Host Controller #1 [8086:1c26] (rev 04)
00:1f.0 ISA bridge [0601]: Intel Corporation HM65 Express Chipset Family LPC Controller [8086:1c49] (rev 04)
00:1f.2 SATA controller [0106]: Intel Corporation 6 Series/C200 Series Chipset Family 6 port SATA AHCI Controller [8086:1c03] (rev 04)
00:1f.3 SMBus [0c05]: Intel Corporation 6 Series/C200 Series Chipset Family SMBus Controller [8086:1c22] (rev 04)
01:00.0 Network controller [0280]: Broadcom Corporation BCM4313 802.11bgn Wireless Network Adapter [14e4:4727] (rev 01)
que isso ...
Por padrão, eth0 não inicia algumas vezes. Portanto, tente
sudo /etc/init.d/networking restart
Então ifconfig -a
Verifique também o seu arquivo /etc/network/interfaces e verifique se a interface eth0 existe.
Espero que isso ajude. Avise-se me.