root@kuroko:/opt# df -h
Filesystem      Size  Used Avail Use% Mounted on
/dev/sda2        52G   11G   38G  23% /
none            1.7G     0  1.7G   0% /sys/fs/cgroup
udev            1.7G     0  1.7G   0% /dev
tmpfs           343M  5.7M  337M   2% /run
none            5.0M  4.0K  5.0M   1% /run/lock
none            1.7G  8.0K  1.7G   1% /run/shm