Hello, Now i want to compile kernel and test userspace program fastly and i find a good guide link: https://vincent.bernat.ch/en/blog/2014-eudyptula-boot In the article, author compile kernel with KBUILD(custom install vmlinux...) 1. export KBUILD_OPTPUT=$HOME/src/kernel-build Is this generate a copy of linux kernel source, right? 2. edit .config and make 3. sudo make modules_install install {INSTALL_MOD_PATH,INSTALL_PATH}=$HOME/src/kernel-dev Ok, I did it and booted a VM with qemu, it is cool. But, my "question" is: when i test some program which needs kernel headers, where to install those headers file? In Documention/kbuild/headers_install.rst, i learn it : make headers_install INSTALL_HDR_PATH=/usr In my case, Is it ok to do that?I do not think it will work. May i: make headers_install INSTALL_HDR_PATH=$HOME/src/kernel-headers is it Ok? Thank you very much! Bo