buildroot/system/skeleton/etc/fstab

# /etc/fstab: static file system information.
#
# <file system> <mount pt>     <type>	<options>         <dump> <pass>
/dev/root       /              ext2	rw,noauto         0      1
proc		/proc	       proc     defaults	  0	 0
devpts		/dev/pts       devpts   defaults,gid=5,mode=620	  0	 0
tmpfs           /dev/shm       tmpfs    mode=0777         0      0
tmpfs           /tmp           tmpfs    mode=1777         0      0
sysfs		/sys	       sysfs    defaults	  0	 0