How to install the wireless card driver in Ubuntu

when the Acer laptop does not have access to WiFi after installing the Ubuntu system, the workaround is as follows:

PS: Acer's wireless network card is generally Broadcom

only four steps:one, under the Media folder under the root directory , create a new folder CDROM, in the terminal input: sudo mkdir /media/cdrom. second, load the installation package , that is, Ubuntu system image (ISO file), in the terminal input: sudo mount-t iso9660-o loop/* path to System image *//media/cdrom

third, open settings-> Software and updates, at the bottom of the "can be installed from the CD-ROM" check, the terminal input command: sudo apt-get install Bcmwl-kernel-source. ( My Computer is acer4752g, My wireless card driver is BCMWL).

Four, restart the computer

How to install the wireless card driver in Ubuntu