我是 Linux 新用户。Windows 资深用户，但不是程序员。我在旧的 Dell Inspiron 1501 上安装了 Ubuntu 14.04.4。我无法通过以太网或 wifi 连接到我的家庭网络。我无法打开 wifi。
sudo lspci
结果是：
Network controller: Broadcom Corporation BCM4331 801.11b/g WLAN (rev01)
Ethernet controller: Broadcom Corporation BCM4401-B0 100Base-TX (rev02)
我只需要 firmware-b43-installer 吗？如果是，我该如何将其放在 USB 驱动器上并从那里安装？
编辑：b43-fwcutter_018-2_amd64.deb然后安装firmware-b43-installer_015-9_all.deb但收到无法broadcom-wl-5.10.56.27.3_mipsel.tar.bz2从镜像访问的错误。
我的 USB 驱动器上有它broadcom-wl-5.10.56.27.3_mipsel.tar.bz2，但是我不知道如何让安装程序使用它。
编辑：
travatron4000@Linux-Lappy:~$ lspci
00:00.0 Host bridge: Advanced Micro Devices, Inc. [AMD/ATI] RS480/RS482/RS485 Host Bridge (rev 10)
00:01.0 PCI bridge: Advanced Micro Devices, Inc. [AMD/ATI] RC4xx/RS4xx PCI Bridge [int gfx]
00:05.0 PCI bridge: Advanced Micro Devices, Inc. [AMD/ATI] RC4xx/RS4xx PCI Express Port 2
00:06.0 PCI bridge: Advanced Micro Devices, Inc. [AMD/ATI] RC4xx/RS4xx PCI Express Port 3
00:12.0 SATA controller: Advanced Micro Devices, Inc. [AMD/ATI] SB600 Non-Raid-5 SATA
00:13.0 USB controller: Advanced Micro Devices, Inc. [AMD/ATI] SB600 USB (OHCI0)
00:13.1 USB controller: Advanced Micro Devices, Inc. [AMD/ATI] SB600 USB (OHCI1)
00:13.2 USB controller: Advanced Micro Devices, Inc. [AMD/ATI] SB600 USB (OHCI2)
00:13.3 USB controller: Advanced Micro Devices, Inc. [AMD/ATI] SB600 USB (OHCI3)
00:13.4 USB controller: Advanced Micro Devices, Inc. [AMD/ATI] SB600 USB (OHCI4)
00:13.5 USB controller: Advanced Micro Devices, Inc. [AMD/ATI] SB600 USB Controller (EHCI)
00:14.0 SMBus: Advanced Micro Devices, Inc. [AMD/ATI] SBx00 SMBus Controller (rev 13)
00:14.1 IDE interface: Advanced Micro Devices, Inc. [AMD/ATI] SB600 IDE
00:14.2 Audio device: Advanced Micro Devices, Inc. [AMD/ATI] SBx00 Azalia (Intel HDA)
00:14.3 ISA bridge: Advanced Micro Devices, Inc. [AMD/ATI] SB600 PCI to LPC Bridge
00:14.4 PCI bridge: Advanced Micro Devices, Inc. [AMD/ATI] SBx00 PCI to PCI Bridge
00:18.0 Host bridge: Advanced Micro Devices, Inc. [AMD] K8 [Athlon64/Opteron] HyperTransport Technology Configuration
00:18.1 Host bridge: Advanced Micro Devices, Inc. [AMD] K8 [Athlon64/Opteron] Address Map
00:18.2 Host bridge: Advanced Micro Devices, Inc. [AMD] K8 [Athlon64/Opteron] DRAM Controller
00:18.3 Host bridge: Advanced Micro Devices, Inc. [AMD] K8 [Athlon64/Opteron] Miscellaneous Control
01:05.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] RS482M [Mobility Radeon Xpress 200]
05:00.0 Network controller: Broadcom Corporation BCM4311 802.11b/g WLAN (rev 01)
08:00.0 Ethernet controller: Broadcom Corporation BCM4401-B0 100Base-TX (rev 02)
08:01.0 SD Host controller: Ricoh Co Ltd R5C822 SD/SDIO/MMC/MS/MSPro Host Adapter (rev 19)
08:01.1 System peripheral: Ricoh Co Ltd R5C843 MMC Host Controller (rev 01)
travatron4000@Linux-Lappy:~/Desktop$ sudo dpkg -i linux*.deb
Selecting previously unselected package linux-firmware-nonfree.
(Reading database ... 167205 files and directories currently installed.)
Preparing to unpack linux-firmware-nonfree_1.11_all.deb ...
Unpacking linux-firmware-nonfree (1.11) ...
Setting up linux-firmware-nonfree (1.11) ...
travatron4000@Linux-Lappy:~/Desktop$ sudo modprobe -r b43 && sudo modprobe b43
然后它什么也没做
编辑 3-4-16@Pilot6：
travatron4000@Linux-Lappy:~$ lspci -knn | grep net -A2
08:00.0 Ethernet controller [0200]: Broadcom Corporation BCM4401-B0 100Base-TX [14e4:170c] (rev 02)
Subsystem: Dell Device [1028:01f5]
08:01.0 SD Host controller [0805]: Ricoh Co Ltd R5C822 SD/SDIO/MMC/MS/MSPro Host Adapter [1180:0822] (rev 19)
travatron4000@Linux-Lappy:~$
编辑：
能够使用此处找到的解决方案使以太网正常工作： 以太网卡 BCM4401-B0 不再被识别？
编辑：
Wifi 已解决：
sudo apt-get install linux-firmware-nonfree
sudo modprobe b43
dmesg |grep -e b43 -e bcma