Create the dirs: mkdir -p $LFS/{proc,sys} Now mount the file systems: mount -t proc proc $LFS/proc mount -t sysfs sysfs $LFS/sys Do some fake mounts: 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