networking - Problems connecting to wifi on Lubuntu 14.04 - Ask Ubuntu

my friend gave me laptop use university. it's samsung np-x420 has lubuntu 14.04. problem don't know how wifi on laptop. see: desktop lubuntu.

i started search around in laptop , clicked on: preferences > network connections. when click on "add", window need choose connection type. click on "wi-fi" , "create". window: wi-fi , don't know do. like, have fill in parameters of wifi network want connect to? how know them, if want use wifi of university?

i'm not sure wifi. need install drivers? have use command in terminal?

i don't have wired connection @ home, can't connect laptop internet. don't have boot cd/usb/etc... have (very slow) laptop @ home can connect wifi , can use download needed drivers, , put them on usb stick them samsung laptop.

i'm not experienced pc's, laptops , such highly appreciate if easy understand , don't use technical terms. if there terms don't understand, of course effort them on internet, please don't make me read several articles understand meaning of word. in advance!

edit: when open terminal , type: lspci -nnk | grep 0280 -a2 following message:

02:00.0 network controller [0280]: broadcom corporation bcm4311 802.11b/g wlan [14e4:4311] (rev 01)

subsystem: ambit microsystem corp. device [1468:0422]

kernel driver in use: b43-pci-bridge

the number 0280 between brackets on first line in red color. wanted post picture of apparently can't post more 2 images, since don't have 10 reputations.

your broadcom requires firmware. please download file b43.zip post #16 here: https://ubuntuforums.org/showthread.php?t=2320529&page=2&highlight=b43.zip transfer desktop of ubuntu machine. right-click , select 'extract here.'

next, in terminal:

sudo mkdir /lib/firmware/b43 sudo cp desktop/b43/* /lib/firmware/b43 sudo modprobe -rf b43 sudo modprobe -rf ssb sudo modprobe b43 

run each command 1 @ time , press enter after each.

it may take reboot. should see network @ network manager icon. click on it, supply password , connect.