I am new to Backtrack and am trying to install a realtek usb device with id 0bda:8176. I found some videos online about how to use the commands "make" and "make install" but I receive make ARCH=i386 CROSS COMPILE= -c /lib/modules/2.6.21.5/build M=/usr/src/rtl8192cu_linux_v2.0_939.20100726 modules make: *** /lib/modules/2.6.21.5/build: no such file or directory. Stop makeby LinuxNovie - Debian