我无法连接网络，无论是有线还是无线。我在这里看到过 安装了 Ubuntu 14.04 - 无法通过有线或无线连接连接到互联网 所以
sudo lshw -c network
*-network
description: Network controller
product: BCM4312 802.11b/g LP-PHY
vendor: Broadcom Corporation
physical id: 0
bus info: pci@0000:03:00.0
version: 01
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list
configuration: driver=b43-pci-bridge latency=0
resources: irq:17 memory:98200000-98203fff
*-network
description: Ethernet interface
product: 88E8072 PCI-E Gigabit Ethernet Controller
vendor: Marvell Technology Group Ltd.
physical id: 0
bus info: pci@0000:86:00.0
logical name: eth0
version: 00
serial: 00:25:b3:42:05:5c
capacity: 1Gbit/s
width: 64 bits
clock: 33MHz
capabilities: pm vpd msi pciexpress bus_master cap_list rom ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt 1000bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=sky2 driverversion=1.30 latency=0 link=no multicast=yes port=twisted pair
resources: irq:30 memory:90100000-90103fff ioport:2000(size=256) memory:90120000-9013ffff
*-network DISABLED
description: Wireless interface
physical id: 2
logical name: wlan0
serial: 00:21:00:b2:16:48
capabilities: ethernet physical wireless
configuration: broadcast=yes driver=b43 driverversion=3.19.0-47-generic firmware=N/A link=no multicast=yes wireless=IEEE 802.11bg
然后
ifconfig -a
eth0 Link encap:Ethernet HWaddr 00:25:b3:42:05:5c
UP BROADCAST MULTICAST MTU:1500 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:1000
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
Interrupt:17
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:369 errors:0 dropped:0 overruns:0 frame:0
TX packets:369 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:27937 (27.9 KB) TX bytes:27937 (27.9 KB)
wlan0 Link encap:Ethernet HWaddr 00:21:00:b2:16:48
BROADCAST MULTICAST MTU:1500 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:1000
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
和
milenko@milenko-HP-Compaq-6830s:~$ ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: eth0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast state DOWN group default qlen 1000
link/ether 00:25:b3:42:05:5c brd ff:ff:ff:ff:ff:ff
3: wlan0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000
link/ether 00:21:00:b2:16:48 brd ff:ff:ff:ff:ff:ff
我应该先尝试什么？