My system is Ubuntu 14.04 32 bit and kernel is 3.13.0-24-generic. How can I download and install wifi driver for above mentioned Network adapter Realtek RTL8723BE?
You can get the drivers from GitHub.
Get a temporary internet connection, then open a terminal and do:
sudo apt-get install linux-headers-generic build-essential git git clone https://github.com/lwfinger/rtlwifi_new.git cd rtlwifi_new make sudo make install sudo modprobe rtl8723be
Your wifi should now be working.