Installing WiFi Adapter Driver in Linux Mint 19

Guys I kindly follow the instructions : (This method works on all distro... just choose the package manager correctly) 1. sudo apt-get update && sudo apt-get upgrade and then sudo apt-get install linux-headers-$(uname -r) (This part may vary from distro to distro) 2. Reboot your pc 3. Goto this link and download the New_Rtl_Wifi folder 4. cd Downloads mv New_Rtl_Wifi ~ cd ~ 5. cd New_Rtl_Wifi 6. make clean && make 7. sudo make install 8. sudo modprobe -r rtw_8723de 9. sudo modprobe rtw_8723de 10. sudo modprobe -r rtw_8723de && sleep 5 && sudo modprobe rtw_8723de ant_sel=4 11. echo "options rtw_8723de ant_sel=4" | sudo tee /etc/modprobe.d/rtw_8723de.conf and then reboot the system and enjoy wifi.. cheers