RealTek 8821au Linux Driver 16.04: install.sh fails

Hello Experts,

I have been trying to install the RealTek 8821au driver on Ubuntu 16.04 Server OS but install.sh keeps failing. The RealTek WiFi comes as a USB adapter from 'Glam Hobby' manufacturer and was bought on Amazon http://ift.tt/1Ai8jrQ I have downloaded the latest drivers from http://ift.tt/29KWAPz and following are the contents.

root@UbuntuServer1604:~/driver/rtl8821AU_linux_v4.3.14_13455.20150212_BTCOEX20150 128-51# ls
clean core hal ifcfg-wlan0 include Kconfig Makefile os_dep platform runwpa wlan0dhcp
root@UbuntuServer1604:~/driver/rtl8821AU_linux_v4.3.14_13455.20150212_BTCOEX20150 128-51#

When I run 'make' with superuser permissions, it fails with following message. I have not changed any file and running them as is. Running 'bash install.sh' available also fails exactly for the same following message.

root@UbuntuServer1604:~/driver/rtl8821AU_linux_v4.3.14_13455.20150212_BTCOEX20150 128-51# make
make ARCH=x86_64 CROSS_COMPILE= -C /lib/modules/4.4.0-31-generic/build M=/root/driver/rtl8821AU_linux_v4.3.14_13455.20150212_BTCOEX20150 128-51 modules
make[1]: Entering directory '/usr/src/linux-headers-4.4.0-31-generic'
Makefile:340: scripts/Kbuild.include: No such file or directory
Makefile:622: arch/x86/Makefile: No such file or directory
/bin/bash: ./scripts/gcc-goto.sh: No such file or directory
Makefile:796: scripts/Makefile.kasan: No such file or directory
Makefile:797: scripts/Makefile.extrawarn: No such file or directory
make[1]: *** No rule to make target 'scripts/Makefile.extrawarn'. Stop.
make[1]: Leaving directory '/usr/src/linux-headers-4.4.0-31-generic'
Makefile:1551: recipe for target 'modules' failed
make: *** [modules] Error 2
root@UbuntuServer1604:~/driver/rtl8821AU_linux_v4.3.14_13455.20150212_BTCOEX20150 128-51#

Searched around in this forum and checked for most common issues but has not fixed my issue. Can someone please help?

Thank you,
Naveen.

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RealTek 8821au Linux Driver 16.04: install.sh fails