solve the wi-fi problem in ubuntu

####--------->run that command to solve the wi-fi problem:


$ git clone -b extended --single-branch https://github.com/lwfinger/rtlwifi_new.git

$ cd rtlwifi_new
$ make
$ sudo make install

If you are gatting Error then click reboot and then secure boot is   "disable" now, please make sure

         ####---> To make the strong signal <------------####

Open Terminal, and enter:

 $ iwconfig

   :-- And note down the wl* number.

   :-- Download the new driver rock.new_btcoex from Github and unzip it to Desktop folder.

    In Terminal, now run these commands:
   
 $ git clone https://github.com/lwfinger/rtlwifi_new/tree/rock.new_btcoex

 $ cd Desktop/rtlwifi_new-rock.new_btcoex
 $  make
 $  sudo make install  # type your ubuntu password
 $  sudo modprobe -rv rtl8723be
 $  sudo modprobe -v rtl8723be ant_sel=2
 $  sudo ip link set wl** up   # use your wl** number which is noted down
 $  sudo iw dev wl** scan

To make the settings permanent, use this command:

 $ echo "options rtl8723be ant_sel=2" | sudo tee /etc/modprobe.d/50-rtl8723be.conf

Note: After your OS (Kernel) update, you need to apply these settings again to get a strong signal.