Get and display the size of file and directory in Linux system using du command 获取和现实linux文件大小（三）

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Get and display the file
size and the directory size using du command.

The du command ( disk
usage ) gather and summarize about how much your disk
space being used by your file and the disk space being use by directory in the Linux system
The du command can be use to find the size of file and the size of
directory in Linux system. The example below show the step to use
the du command to get the size of file and the size of directory in
Linux Fedora Core system.

Using du command to get
file size.

The du command
below show the files size in the current directory in MB or K.



[root@fedora ~]#


du -h


4.0K ./.rhopenoffice1.1/program/addin

108K ./.gnome2

28K ./.nautilus/metafiles

32K ./.nautilus

6.0M ./.mozilla/firefox/1wvl2gwo.default/Cache

12K ./.mozilla/firefox/1wvl2gwo.default/chrome

12M .



The output from above command show the size of each file, directory and with the total size
used in your system in human readable size ( -h ).

Get the total size of
current directory.

The du command can be use
to determine the total size of file in current directory. The
example below show the du command use with -s (summarize) and -h
(human readable format) option to summaries the size of disk space
taken by current directory.



[root@fedora ~]#


du
-s


768096 .

[root@fedora ~]#


du -sh


751M .

[root@fedora ~]#

To get the size of file
and directory in current directory.



[root@fedora ~]#


du -sh
*


14M 20060524-033-x86.exe

85M labu-punyer

8.0K libjmti.odt

4.0K linux-feeds.txt

4.0K mambo_conf.txt

8.0K yumex-0-1.0.1-1.0.fc5.html

408K yumex-1.0.1-1.0.fc5.noarch.rpm

8.0K yum install

11M zope-2.8.5-1.fc5.i386.rpm

[root@fedora ~]#

Display the size of
specific file extension.

The example below show du
command execute with -c option to get the size of each file that
have filename ending with .txt
and then display grand total of
all files
in human readable format.



[root@fedora ~]#


du -ch
*.txt


4.0K create.drupal-2.txt

4.0K create.drupal.db.txt

4.0K drupal-pass.txt

4.0K joomla-bazz.txt

4.0K linux-feeds.txt

4.0K mambo_conf.txt

8.0K msql-bazz.txt

4.0K setup_mysql_mambo.txt

4.0K simple.txt

40K total

[root@fedora ~]#

Check the size of home
directory.

The example below show
the use of du command to get the disk usage of each user home
directory on the system.



[root@fedora home]#


pwd


/home

[root@fedora home]#


du -sh *


492K bazz

48K botol

44K hamirul

22M kambing

48K kayu

56K labu

80K sysuser

40K william

40K ycluckers

[root@fedora home]#



To produce grand total of
the /home
directory size.



[root@fedora home]#


pwd


/home

[root@fedora home]#


du -csh *


492K bazz

48K botol

44K hamirul

22M kambing

48K kayu

56K labu

80K sysuser

40K william

40K ycluckers

23M total

[root@fedora home]#



The following are some of the flags and arguments that can be used for the
du command:




· -a, --all

write counts for all files, not just directories


·
--apparent-size


print apparent sizes, rather than disk usage; although the apparent
size is usually smaller, it may be larger due to holes in (`sparse')
files, internal fragmentation, indirect blocks, and the like


·
-B, --block-size=SIZE


use SIZE-byte blocks


· -b, --bytes


equivalent to `--apparent-

size

--block-siz

e=1

'


· -c, --total

produce a grand total


· -D, --dereference-args


dereference FILEs that are symbolic links


· -H

like
--si

, but also
evokes a warning; will soon change to be equivalent to
--dereference-args

(-D

)


· -h

,
--human-readable

print sizes in human readable format (e.g., 1K 234M
2G)


· --si

like
-h

, but use
powers of 1000 not 1024


· -k

like
--block-size=1K


· -l

,
--count-links

count sizes many times if hard linked


· -L

,
--dereference

dereference all symbolic links


· -P

,
--no-dereference

don't follow any symbolic links (this is the default)


· -0,

--null

end each output line with 0 byte rather than newline


· -S

,
--separate-

dirs

do not include size of subdirectories


· -s

,
--summarize

display only a total for each argument


· -

x

,
--one-file-system

skip directories on different filesystems


· -X

FILE

, --exclude-from=FILE

Exclude files that match any pattern in FILE.


· --exclude=

PATTERN

Exclude files that match PATTERN.


· --

max-depth=N

print the total for a directory (or file, with
--all

) only
if it is N or fewer levels below the command line argument;
--max-depth=0


is the same as --summarize


· --help

display this help and exit


· --version

output version information and exit



NAME

du - estimate file space usage

Usage: du [OPTION]... [FILE]...

Summarize disk usage of each FILE, recursively for directories.



More information on du
command:


# info du



# man du



# du --help




Keywords:
du command, check file size, check directory size, file size, directory size, file space usage, directory
space usage, size of file, size of directory, get directory size, get file size.