After, re-installing Ubuntu the wireless Drivers were not present in it due to which I was unable to connect to Wifi. So for installing the wireless Drivers through terminal, the command as follows. Don’t panic it require the execution of the few commands.
To identify a card that was installed inside your computer prior to purchase, please open a Terminal and execute:
lspci -vvnn | grep -A 9 Network
PCI ( Peripheral Component Interconnect) devices.
Examples of PCI devices
Context Line Control
- -A NUM, –after-context=NUM
- Print NUM lines of trailing context after matching lines. Places a line containing a group separator (—) between contiguous groups of matches. With the -o or –only-matching option, this has no effect and a warning is given.
07:00.0 Network controller : Broadcom Corporation BCM43142 802.11b/g/n [14e4:4365] (rev 01) Subsystem: Dell Wireless 1704 802.11n + BT 4.0 [1028:0016] Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR+ FastB2B- DisINTx- Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx- Latency: 0, Cache Line Size: 32 bytes Interrupt: pin A routed to IRQ 19 Region 0: Memory at f7c00000 (64-bit, non-prefetchable) [size=32K] Capabilities: <access denied> Kernel driver in use: wl
- The Chip ID: BCM43142
- The PCI-ID: 14e4: 4365
- Kernel driver in use: wl
Installing STA drivers
STA – Internet access
sudo apt-get update
sudo apt-get --reinstall install bcmwl-kernel-source
Broadcom STA Wireless driver (Proprietary)
For Chip ID BCM 4311, 4312, 4313, 4321, 4322, 4331, 4352, 4360, 43142, 43224, 43225, 43227, 43228, and others as suggested by Broadcom.
The propietary Broadcom STA Wireless driver is maintained upstream by Broadcom. As this driver is closed source, fixes in the driver itself may only be provided by Broadcom. As a convenience, Ubuntu offers two versions of this driver:
The bcmwl-kernel-source package aims to offer a later version for a given release. Instructions for installation may be found later in this article.
The broadcom-sta package aims to offer an earlier version for a given release. For further installation instructions, please see here.