Can anybody explain the difference in the disk usage of a directory by du and the one calculated by adding up the size of every file?

• To: "fedora" <fedora-list@xxxxxxxxxx>
• Subject: Can anybody explain the difference in the disk usage of a directory by du and the one calculated by adding up the size of every file?
• From: "VJ" <vj@xxxxxxxxxxxxxxxxxxxxxxx>
• Date: Wed, 17 Nov 2004 11:48:46 -0000
• Reply-to: For users of Fedora Core releases <fedora-list@xxxxxxxxxx>

Hi,

    Can anybody explain the difference in the disk usage of a directory by
du and the one calculated by adding up the size of every file?

[root@dxr tmp]# echo "(0 `find /home/vj/ -name \* -printf "+%s "`) / 1024" |
bc
29091

[root@dxr tmp]# du -s /home/vj/
31883   /home/vj/

Thinking du might be using 1000 as 1Kb rather than 1024, following result is

[root@dxr tmp]# echo "(0 `find /home/vj/ -name \* -printf "+%s "`) / 1000" |
bc
29790

Regards from
VJ

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