[root@stats /]# du -cksh * | sort -rh | head
du: cannot access `proc/8199/task/8199/fd/3': No such file or directory
du: cannot access `proc/8199/task/8199/fdinfo/3': No such file or directory
du: cannot access `proc/8199/fd/4': No such file or directory
du: cannot access `proc/8199/fdinfo/4': No such file or directory
12G    total
9.1G    opt
1.2G    usr
943M    home
417M    var
290M    tmp
19M    lib64
19M    etc
7.8M    sbin
6.1M    bin