介绍一个好LINUX命令，显示当前目录下每一个子目录占用的空间大小

 1 # du -h --max-depth=1
 2 532K    ./tmp
 3 14M     ./sbin
 4 216M    ./lib
 5 du: cannot access `./proc/2419/task/2419/fd/4': No such file or directory
 6 du: cannot access `./proc/2419/task/2419/fdinfo/4': No such file or directory
 7 du: cannot access `./proc/2419/fd/4': No such file or directory
 8 du: cannot access `./proc/2419/fdinfo/4': No such file or directory
 9 0       ./proc
10 160K    ./dev
11 219M    ./var
12 59M     ./boot
13 642M    ./usr
14 4.0K    ./cgroup
15 20K     ./home
16 16K     ./lost+found
17 0       ./selinux
18 4.0K    ./mnt
19 23M     ./etc
20 125M    ./root
21 5.9M    ./bin
22 4.0K    ./srv
23 20M     ./lib64
24 4.0K    ./media
25 4.0K    ./opt
26 0       ./sys
27 1.3G    .