Creating device nodes statically with
mknod is quite hard work and inflexible. There are other ways to create device nodes automatically on demand:
devtmpfs: This is a pseudo filesystem that you mount over
/devat boot time. The kernel populates it with device nodes for all the devices that the kernel currently knows about and creates nodes for new devices as they are detected at runtime. The nodes are owned by
rootand have default permissions of 0600. Some well-known device nodes, such as
/dev/random, override the default to 0666 (see
mdev: This is a BusyBox applet that is used to populate a directory with device nodes and to create new nodes as needed. There ...