Sample Linux kernel module that prints hello world.

Compile

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Install dev tools and kernel-devel:

sudo dnf install kernel-devel make gcc

Now you can compiled the module:

cd src
make -C /lib/modules/$(uname -r)/build M=$(pwd) modules

Remove the module and build files with:

make clean

Load module

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sudo insmod ./hello.ko

Unload module

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sudo rmmod hello

Check output

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dmesg