Various file systems exported by the kernel don't exist at all on your hard drive, but are used to communicate things to and from the kernel itself. Begin by creating directories onto which the file systems will be mounted: mkdir -p $LFS/{proc,sys} Now mount the file systems: mount -t proc proc $LFS/proc mount -t sysfs sysfs $LFS/sys Remember that if for any reason you stop working on your LFS, and start again later, it's important to check that these file systems are mounted again before entering the chroot environment, otherwise problems could occur. Shortly, we'll be mounting a few more file systems from within the chroot environment. To keep the host up-to-date, we'll do a fake mount for each of these now: mount -f -t ramfs ramfs $LFS/dev mount -f -t tmpfs tmpfs $LFS/dev/shm mount -f -t devpts -o gid=4,mode=620 devpts $LFS/dev/pts