1 [root@localhost ~]# cat x.sh 
 2 #!/bin/bash
 3 
 4 fun_x () {
 5 
 6     du -h $1 |tail -1
 7 
 8 }
 9 
10 for i in `ls $1`
11 do
12     fun_x $1$i
13 done
14 [root@localhost ~]# sh x.sh /usr/
15 132M    /usr/bin
16 4.0K    /usr/etc
17 4.0K    /usr/games
18 34M    /usr/include
19 325M    /usr/lib
20 447M    /usr/lib64
21 34M    /usr/libexec
22 6.1G    /usr/local
23 28M    /usr/sbin
24 1.1G    /usr/share
25 48M    /usr/src
26 0    /usr/tmp
27 [root@localhost ~]#