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I'm using Ubuntu 12.04. I tried with this

sudo iwlist eth0 scan

but this doesn't seem to work :(..It says "interface dosn't support scanning" What to do? Please help.. I can't access Internet on Ubuntu.

Even I've mobile broadband usb, but even that doesn't get detected. Other pendrives get detected

More details

*-network UNCLAIMED 
description: Network controller 
product: Broadcom Corporation 
vendor: Broadcom Corporation 
physical id: 0 
bus info: pci@0000:08:00.0 
version: 01 
width: 64 
bits clock: 33MHz 
capabilities: pm msi pciexpress bus_master cap_list configuration: latency=0 resources: memory:c1500000-c1507fff 

And more details: lspci

00:00.0 Host bridge: Intel Corporation Ivy Bridge DRAM Controller (rev 09)
00:01.0 PCI bridge: Intel Corporation Ivy Bridge PCI Express Root Port (rev 09)
00:02.0 VGA compatible controller: Intel Corporation Ivy Bridge Graphics Controller (rev 09)
00:14.0 USB controller: Intel Corporation Panther Point USB xHCI Host Controller (rev 04)
00:16.0 Communication controller: Intel Corporation Panther Point MEI Controller #1 (rev 04)
00:1a.0 USB controller: Intel Corporation Panther Point USB Enhanced Host Controller #2 (rev 04)
00:1b.0 Audio device: Intel Corporation Panther Point High Definition Audio Controller (rev 04)
00:1c.0 PCI bridge: Intel Corporation Panther Point PCI Express Root Port 1 (rev c4)
00:1c.1 PCI bridge: Intel Corporation Panther Point PCI Express Root Port 2 (rev c4)
00:1d.0 USB controller: Intel Corporation Panther Point USB Enhanced Host Controller #1 (rev 04)
00:1f.0 ISA bridge: Intel Corporation Panther Point LPC Controller (rev 04)
00:1f.2 SATA controller: Intel Corporation Panther Point 6 port SATA Controller [AHCI mode] (rev 04)
00:1f.3 SMBus: Intel Corporation Panther Point SMBus Controller (rev 04)
01:00.0 VGA compatible controller: Advanced Micro Devices [AMD] nee ATI Thames XT/GL [Radeon HD 7600M Series]
07:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8101E/RTL8102E PCI Express Fast Ethernet controller (rev 05)
08:00.0 Network controller: Broadcom Corporation Device 4365 (rev 01)
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1 Answer 1

Update:

Please follow this question to install the driver first. The answer is dependent on the kernel version. To know your kernel version you can execute uname -a

Broadcom 4365 wireless driver with 3.4 / 3.5 kernel


eth0 is not wireless adapter. It is Ethernet adapter.

Try sudo iwlist wlan0 scanning | egrep 'Cell |Encryption|Quality|Last beacon|ESSID'

Better, first enable wireless adapter using hardware switch.

then click on top panel network manager button to see the available networks.

Related:

How do I scan for Wireless Access Points?

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It says "interface doesn't support scanning" –  Sameer Thigale Jan 16 '13 at 16:35
    
even this doesn't work: cd /sys/class/net/wlan0/wireless/ –  Sameer Thigale Jan 16 '13 at 16:36
    
edit your question and include result of sudo lshw -c network, lsmod and rfkill list all –  Web-E Jan 16 '13 at 17:21
    
*-network UNCLAIMED description: Network controller product: Broadcom Corporation vendor: Broadcom Corporation physical id: 0 bus info: pci@0000:08:00.0 version: 01 width: 64 bits clock: 33MHz capabilities: pm msi pciexpress bus_master cap_list configuration: latency=0 resources: memory:c1500000-c1507fff –  Sameer Thigale Jan 17 '13 at 14:56
    
0: dell-wifi: Wireless LAN Soft blocked: yes Hard blocked: yes 1: dell-bluetooth: Bluetooth Soft blocked: yes Hard blocked: yes –  Sameer Thigale Jan 17 '13 at 14:56
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