Filesystem                  1K-blocks    Used Available Use% Mounted on
/dev/mapper/ubuntu--vg-root  81461992 6146784  71154084   8% /
none                                4       0         4   0% /sys/fs/cgroup
udev                         16437404       4  16437400   1% /dev
tmpfs                         3290620    1324   3289296   1% /run
none                             5120       0      5120   0% /run/lock
none                         16453096    1008  16452088   1% /run/shm
none                           102400      36    102364   1% /run/user
/dev/sdb2                      241965  138539     90934  61% /boot
/dev/sdb1                      523248    3456    519792   1% /boot/efi