du

du 功能说明：统计磁盘空间使用情况。
 
参数选项：
-a  显示所有文件大小。
-h  以人类刻度的方式查看，以K、M、G为单位。
-s  显示文件的大小总和。
--exclude=<目录或文件>  略过指定的目录或文件。
-X，--exclude-from=FILE  从文件中读取需要略过的目录或文件。
--max-depth=N  显示N级子目录的大小，当N=0时，该参数和-s参数的效果一样。


显示所有目录或文件所占用空间
[root@testdb ~]# du -a
4    ./.bashrc
4    ./ls.txt
4    ./.pydistutils.cfg
4    ./.bash_profile
4    ./a.log
20    ./slow.log
4    ./.tcshrc
12    ./.bash_history
4    ./.cshrc
4    ./.viminfo
0    ./c.log
4    ./.cache/abrt/lastnotification
8    ./.cache/abrt
12    ./.cache
4    ./.bash_logout
4    ./b.log
4    ./.pip/pip.conf
8    ./.pip
4    ./.config/abrt
8    ./.config
4    ./my.cnf
4    ./.pki/nssdb
8    ./.pki
0    ./.ssh/authorized_keys
4    ./.ssh
120    .


参数-s与-h使用案例
显示当前目录的总大小
[root@testdb ~]# du -s
120    .


-h参数会转换易读的大小结果
[root@testdb ~]# du -h
8.0K    ./.cache/abrt
12K    ./.cache
8.0K    ./.pip
4.0K    ./.config/abrt
8.0K    ./.config
4.0K    ./.pki/nssdb
8.0K    ./.pki
4.0K    ./.ssh
120K    .


-sh 是常用的命令组合，也是推荐的方法
[root@testdb ~]# du -sh
120K    .


显示指定目录的总大小
[root@testdb ~]# du -sh /usr/local
458M    /usr/local


显示指定层次的目录的大小
[root@testdb ~]# du -h --max-depth=1 /usr/local
4.0K    /usr/local/lib
4.0K    /usr/local/games
4.0K    /usr/local/src
4.0K    /usr/local/libexec
116K    /usr/local/bin
4.0K    /usr/local/etc
458M    /usr/local/qcloud
112K    /usr/local/share
4.0K    /usr/local/include
4.0K    /usr/local/sbin
4.0K    /usr/local/lib64
458M    /usr/local
[root@testdb ~]# 
[root@testdb ~]# du -h --max-depth=2 /usr/local
4.0K    /usr/local/lib
4.0K    /usr/local/games
4.0K    /usr/local/src
4.0K    /usr/local/libexec
116K    /usr/local/bin
4.0K    /usr/local/etc
8.0K    /usr/local/qcloud/gpu
12K    /usr/local/qcloud/nv
182M    /usr/local/qcloud/monitor
4.9M    /usr/local/qcloud/drivers
8.0K    /usr/local/qcloud/udev_run
36K    /usr/local/qcloud/irq
8.0K    /usr/local/qcloud/rps
12M    /usr/local/qcloud/stargate
260M    /usr/local/qcloud/YunJing
16K    /usr/local/qcloud/action
458M    /usr/local/qcloud
4.0K    /usr/local/share/applications
4.0K    /usr/local/share/info
80K    /usr/local/share/man
20K    /usr/local/share/locale
112K    /usr/local/share
4.0K    /usr/local/include
4.0K    /usr/local/sbin
4.0K    /usr/local/lib64
458M    /usr/local

 
排除指定的目录
[root@testdb ~]# du -h --max-depth=2 /usr/local --exclude=/usr/local/share 
4.0K    /usr/local/lib
4.0K    /usr/local/games
4.0K    /usr/local/src
4.0K    /usr/local/libexec
116K    /usr/local/bin
4.0K    /usr/local/etc
8.0K    /usr/local/qcloud/gpu
12K    /usr/local/qcloud/nv
182M    /usr/local/qcloud/monitor
4.9M    /usr/local/qcloud/drivers
8.0K    /usr/local/qcloud/udev_run
36K    /usr/local/qcloud/irq
8.0K    /usr/local/qcloud/rps
12M    /usr/local/qcloud/stargate
260M    /usr/local/qcloud/YunJing
16K    /usr/local/qcloud/action
458M    /usr/local/qcloud
4.0K    /usr/local/include
4.0K    /usr/local/sbin
4.0K    /usr/local/lib64
458M    /usr/local