Filesystem                   1K-blocks       Used  Available Use% Mounted on
udev                           4017872          0    4017872   0% /dev
tmpfs                           815248       2944     812304   1% /run
/dev/mapper/ubuntu--vg-root 2875329280 2369459984  359787916  87% /
tmpfs                          4076232         16    4076216   1% /dev/shm
tmpfs                             5120          0       5120   0% /run/lock
tmpfs                          4076232          0    4076232   0% /sys/fs/cgroup
/dev/sdd1                    961301000  901109532   50407484  95% /mnt/d
/dev/sde1                    307534288  295273848    9118356  98% /mnt/b
/dev/sdf1                   1922727280 1709490232  193685544  90% /mnt/e
/dev/sda1                   2884152536 2325082488  529751016  82% /mnt/a
/dev/sdc1                   3844639728      90140 3649182372   1% /mnt/c
/dev/sdb2                       241965     197598      31875  87% /boot
tmpfs                           815244          0     815244   0% /run/user/1000