Hello
I am new in making module in linux ,I tried the first module programming as you see as follows
/*
* hello-1.c - The simplest kernel module.
*/
#include <linux/module.h> /* Needed by all modules */
#include <linux/kernel.h> /* Needed for KERN_INFO */
int init_module(void)
{
printk(KERN_INFO "Hello world 1.\n");
/*
* A non 0 return means init_module failed; module can't be loaded.
*/
return 0;
}
void cleanup_module(void)
{
printk(KERN_INFO "Goodbye world 1.\n");
}

Then the tutorials told me for compiling the module I should use the following commands

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

would you please explain me what is $(sehll uname –r) and M=$(PWD)

Sincerely yours Mohsena

I guess that what you have put above is the Makefile
PS: please put all the code inside <code> </code> tags so that the indendation is clear.
now for makefiles
$(shell uname -r) would run the command uname -r and put the output instead same for M=$(PWD)
so
make -C /lib/modules/$(shell uname -r)/build M=$(PWD) clean
would get replaced by
make -C /lib/modules/2.6.9-1.667/build M=/home/myself/sources/
or something like that where the 2.6... is your version of the kernel and /home/myself/sources is the directory where you have the sources (current directory).
-C instructs the make command to change to the directory before doing anything.
The M=$PWD is used by the build/Makefile
if you check that you will see this line

# Use make M=dir to specify directory of external module to build

Hello and thank you very much for your responce
I tried to do what you recommended me as follows
$ make -c /lib/modules/2.6.4-override-default/build M=/home/linux/hello-1.c
but it sent me back the following error:
bach:Make :command nout found
Please help me
sincerely yours Mohsena

I think you have not installed the make package.
try installing that.
and the command is
<code>
make -c /lib/modules/2.6.4-override-default/build M=/home/linux/
</code>
better
just enter the stuff as it to a text file named Makefile and then
do a make