Lubuntu doesn't see Ethernet and Wireless connection on Dell 1300 Inspiron

Question

I just installed Lubuntu on Dell 1300. But I can't connect to Internet on this laptop and so I can't install all updates and drivers. I didn't find any information about my problem for Ethernet connection and I don't know how to solve this problem. Can you help me?

Output of lspci -knn | grep -EA2 'Eth|Net'

02:03.0 Network controller [0280]: Broadcom Corporation BCM4318 [AirForce One 54g] 802.11g Wireless LAN Controller [14e4:4318] (rev
 02)
    Subsystem: Dell Wireless 1370 WLAN Mini-PCI Card [1028:0005]
    Kernel driver in use: b43-pci-bridge

Answer 1

For a 64-bit system:

Download these files to your home folder:

http://mirrors.kernel.org/ubuntu/pool/main/b/b43-fwcutter/b43-fwcutter_018-2_amd64.deb http://www.lwfinger.com/b43-firmware/broadcom-wl-5.100.138.tar.bz2

Then run in terminal:

sudo dpkg -i b43-fwcutter_018-2_amd64.deb
tar xfvj broadcom-wl-5.100.138.tar.bz2
sudo b43-fwcutter -w /lib/firmware broadcom-wl-5.100.138/linux/wl_apsta.o

For 32-bit:

http://mirrors.kernel.org/ubuntu/pool/main/b/b43-fwcutter/b43-fwcutter_018-2_i386.deb http://www.lwfinger.com/b43-firmware/broadcom-wl-5.100.138.tar.bz2

sudo dpkg -i b43-fwcutter_018-2_i386.deb
tar xfvj broadcom-wl-5.100.138.tar.bz2
sudo b43-fwcutter -w /lib/firmware broadcom-wl-5.100.138/linux/wl_apsta.o

You can download the files using another computer.

The Ethernet should be fixed by

sudo apt-get purge bcmwl-kernel-source