Hi there, In the process of setting up webcams (and getting greatly frustrated) I have been using mknod to create device entries. This is something I'm not really familiar with and I have some questions. I am trying things at present and don't really know why I am typing stuff I find in Google! Questions: 1) How are major and minor device numbers assigned? e.g. a webpage will say type "mknod /dev/video0 c 81 0". I understand the syntax but why 81 and 0 for the major and minor numbers? 2) How do these devices you create interact with udev? Permissions and other things seem to disappear after a reboot. Should I be using udev instead of mknod? URLs to articles would be appreciated or just people's comments. I promise to Wiki what I find out as I have been doing for most of my discoveries... Ian