bash-3.1$ make
make -C /lib/modules/2.6.20.6/source SUBDIRS=/home/rapid/Desktop/vloopback-1.0 modules
make[1]: Entering directory `/usr/src/linux-2.6.20.6'
  CC [M]  /home/rapid/Desktop/vloopback-1.0/vloopback.o
/home/rapid/Desktop/vloopback-1.0/vloopback.c:136:75: linux/config.h: No such file or directory
/home/rapid/Desktop/vloopback-1.0/vloopback.c: In function `vloopback_open':