Dear fellows, I am new to kernel modules and am trying to get a module work right now. I need some tools to debug. In order not to risk the host machine, I am thinking of using UML. I downloaded the kernel RPM ------user_mode_linux-2.4.19.5um-0.i386.rpm and root filesystem ------Debian-3.0r0.ext2.bz2 and got Debian boot sucessfully. However, I still have several questions: 1. The kernel version does not match filesystem: (none):/lib/modules# ls 2.4.18-37um (none):/lib/modules# uname -r 2.4.19-5um 2. How do I get my own module compiled into the kernel and debug with it? I've been reading the UML homepage http://user-mode-linux.sourceforge.net/index.html but have not really found tips helpful to me. Could anyone give me any hint how to do this, or where to look at? TIA! Lei -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/