我用du看子目录大小，但是如果加-h参数，出来的就是带单位的那种，不能用sort排序
不加-h是对的

# sudo du  |sort -n -r
28692	.
12980	./installer
11640	./installer/cdebconf
2784	./samba
68	./apt
12	./samba/cores
12	./fsck
4	./unattended-upgrades
4	./samba/cores/smbd
4	./samba/cores/nmbd
4	./news
4	./mysql
4	./landscape
4	./dist-upgrade
4	./apparmor

加了-h参数就是郁闷的。。。

# sudo du -h |sort -n -r
68K	./apt
29M	.
13M	./installer
12M	./installer/cdebconf
12K	./samba/cores
12K	./fsck
4.0K	./unattended-upgrades
4.0K	./samba/cores/smbd
4.0K	./samba/cores/nmbd
4.0K	./news
4.0K	./mysql
4.0K	./landscape
4.0K	./dist-upgrade
4.0K	./apparmor
2.8M	./samba