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配置:
lenovo
product: Intel(R) Core(TM) i5-3470 CPU @ 3.20GHz
64 bits
4G內存
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原先是WIN8系統,使用 Ubuntu 12.04.1 LTS (GNU/Linux 3.2.0-29-generic x86_64)鏡像安裝。
安裝完系統後開機後ubnutu無法聯網,在終端中#:ifconfig後,
eth0 Link encap:Ethernet HWaddr xx:xx:xx:xx:xx:xx
inet6 addr: fe80::d63d:7eff:fec8:bf7b/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:3406 errors:0 dropped:0 overruns:0 frame:0
TX packets:378 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:478898 (478.8 KB) TX bytes:61014 (61.0 KB)
Interrupt:43 Base address:0xa000
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:16436 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
說明一下公司網絡環境
統一自動分配IP。爲什麼重裝系統後會無法正常聯網呢。
Q1: 網卡驅動安裝不正常?
A1:可以排除
通過lshw查看硬件信息
joe@ubuntu:~$ lshw -c net
WARNING: you should run this program as super-user.
*-network
description: Ethernet interface
product: RTL8111/8168B PCI Express Gigabit Ethernet controller
而且ifconfig也是有eth0的,所以不可能是這個問題。
Q2:網絡通路查看
A2:
ping 127.0.0.1
ping 127.0.0.1 正常
ping同網段的主機
ping 172.16.148.1
提示:connect: network is unreachable
網絡不通
Com a rede já pronta, agora vamos efetuar o compartilhamento da Internet.
Agora vamos habilitar o encaminhamento de IPv4.
原來公司這邊使用的IP自動分配爲IPV4的IP,而Ubuntu 12.04 server 默認的話是IPV6
# net.ipv4.ip_forward=1
當然因爲公司的網絡管理是自動獲取IP不允許綁定IP,一個端口自動獲取完就與mac綁定了。如果是使用固定的靜態IP配置應該不出現這個問題。
eth0 Link encap:Ethernet HWaddr xxxxxxxxx
inet addr:172.16.148.107 Bcast:172.16.148.255 Mask:255.255.255.0
inet6 addr: fe80::d63d:7eff:fec8:bf7b/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:5194 errors:0 dropped:0 overruns:0 frame:0
TX packets:449 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:730904 (730.9 KB) TX bytes:70328 (70.3 KB)
Interrupt:43 Base address:0xa000
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:16436 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)