demo# du -hcd 1 /
2.0K    /.snap
1.5K    /dev
 26K    /tmp
 11G    /usr
 37M    /var
1.6M    /etc
900K    /bin
 22M    /boot
3.2M    /lib
136K    /libexec
2.0K    /mnt
2.0K    /proc
3.2M    /rescue
 18M    /root
3.4M    /sbin
444M    /~
 11G    /
 11G    total