В других случаях, следует использовать linux команду df -h
% df -h
Filesystem Size Used Avail Use% Mounted on
devtmpfs 3.8G 0 3.8G 0% /dev
tmpfs 3.8G 0 3.8G 0% /dev/shm
tmpfs 3.8G 393M 3.5G 11% /run
tmpfs 3.8G 0 3.8G 0% /sys/fs/cgroup
/dev/mapper/cl_www2-root 16G 4.4G 11G 30% /
/dev/mapper/cl_www2-usr 16G 4.5G 11G 31% /usr
/dev/sda1 974M 340M 567M 38% /boot
/dev/mapper/cl_www2-var 469G 164G 281G 37% /var
tmpfs 777M 0 777M 0% /run/user/0
overlay 469G 164G 281G 37% /var/lib/docker/overlay2/afafbda3c06c0b18b5a6e0f32babd905acd7affb35a805f31ad18902d5a4047b/merged
tmpfs 777M 0 777M 0% /run/user/1003