Filesystem      Size  Used Avail Use% Mounted on
udev            2.0G     0  2.0G   0% /dev
tmpfs           395M   12M  384M   3% /run
/dev/sdb1       3.9G  1.1G  2.8G  29% /cdrom
/dev/loop0      1.1G  1.1G     0 100% /rofs
/cow            2.0G 1023M  952M  52% /
tmpfs           2.0G   84K  2.0G   1% /dev/shm
tmpfs           5.0M  8.0K  5.0M   1% /run/lock
tmpfs           2.0G     0  2.0G   0% /sys/fs/cgroup
tmpfs           2.0G  1.4M  2.0G   1% /tmp
cgmfs           100K     0  100K   0% /run/cgmanager/fs
tmpfs           395M  100K  395M   1% /run/user/999