df:

/bin/df -ha

Filesystem            Size  Used Avail Use% Mounted on
/dev/hda6             4.9G  2.1G  2.6G  46% /
proc                     0     0     0   -  /proc
/sys                     0     0     0   -  /sys
udev                   10M   72K   10M   1% /dev
devshm                443M     0  443M   0% /dev/shm
devpts                   0     0     0   -  /dev/pts
usbfs                    0     0     0   -  /proc/bus/usb
/dev/sda1             493M  258M  236M  53% /mnt/usb
/dev/hda1              40G   16G   24G  40% /mnt/w32
/dev/hdc              4.4G  4.4G     0 100% /mnt/dvd