stuck at compilation of kernel module.

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http://ubuntuforums.org – Hi, I am trying to build the hello world module described in this article http://tldp.org/LDP/lkmpg/2.6/html/lkmpg.html#AEN121 and I using the exact makefile and source described but it does not compile. I am somewhat new to linux so troubleshooting this is not easy for me. the make file looks like this: (and I have tabs there) obj-m += hello-1.o all: make -C /lib/modules/$(shell uname -r)/build M=$(PWD) modules clean: make -C /lib/modules/$(shell uname -r)/build M=$(PWD) clean but when I issue make, I get this: gustavo@gustavo-Null:~/Desktop/projects/kernel_mod$ (Hardware)