/bin : Essential binaries /lib : Library and kernel modules /boot : Static files of boot loader /mnt : Mount files /etc : Host specific system config /opt : Add-on Application software /usr : Shareable and read-only data /root : Home of root /var : Variable data files /sbin : System binary /tmp : Temporary files delete on bootup /dev : Location of Special or device files /home : User home directory จดไว้ก่อนๆ เป็น reference ไว้