Filesystem Size Used Available Use% Mounted on /dev/root 5.4M 5.4M 0 100% / tmpfs 30.3M 120.0K 30.1M 0% /tmp devfs 30.3M 0 30.3M 0% /dev /dev/sda2 949.6M 20.0K 901.4M 0% /opt /dev/sda3 457.5G 20.0K 434.3G 0% /mmc /dev/sda4 457.5G 20.0K 434.3G 0% /mmc