ubuntu@ubuntu:~$ df
Filesystem           1K-blocks      Used Available Use% Mounted on
unionfs                 905432    668432    237000  74% /
varrun                  257944        84    257860   1% /var/run
varlock                 257944         0    257944   0% /var/lock
procbususb               10240       108     10132   2% /proc/bus/usb
udev                     10240       108     10132   2% /dev
devshm                  257944         0    257944   0% /dev/shm
lrm                     257944      7696    250248   3% /lib/modules/2.6.17-10-generic/volatile
tmpfs                   257944        12    257932   1% /tmp