du -cH / | tail -n1

[root@XXXXXXX boot]# du -cH / | tail -n1
du: cannot access ‘/proc/13659/task/13659/fd/4’: No such file or directory
du: cannot access ‘/proc/13659/task/13659/fdinfo/4’: No such file or directory
du: cannot access ‘/proc/13659/fd/4’: No such file or directory
du: cannot access ‘/proc/13659/fdinfo/4’: No such file or directory