Filesystem     1K-blocks    Used Available Use% Mounted on
udev             1950404       0   1950404   0% /dev
tmpfs             393008    6152    386856   2% /run
/dev/sdb1        3902056 3178480    723576  82% /cdrom
/dev/loop1        827776  827776         0 100% /rofs
/cow              799440  131804    626372  18% /
tmpfs            1965032       0   1965032   0% /dev/shm
tmpfs               5120       4      5116   1% /run/lock
tmpfs            1965032       0   1965032   0% /sys/fs/cgroup
tmpfs            1965032    1184   1963848   1% /tmp
tmpfs             393008       8    393000   1% /run/user/999