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Old 07-09-2009, 05:57 AM   #1
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The DU command and DF command, Different Outputs???

Hi to all,

I read an article to why the DF command and DU command can give you different outputs and the general gist of the article was that the DF command looks at different information, regarding something called open files?

Article in question:

My question is how do I get the DF command to relate to the DU command because at the moment they are out by quite a lot. 12GB in fact. How do I re-sync the output so they are at least similar?

Thanks to all that reply.
Old 07-10-2009, 12:45 AM   #2
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They will tend to differ on large/busy systems, you just have to be aware that they are DIFFERENT cmds.

You should read these pages carefully

and note the different switches available. Pay particular attention to things like --si (see for more detail. Also --apparent-size etc.
Old 07-10-2009, 05:10 AM   #3
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Do you know how to re-sync so they can give me the same result i.e. get rid of the files that are causing the difference. When I run the lsof command and specify the directory I can see which files they are and just want to be able to get rid of them for good.
Old 07-10-2009, 07:25 AM   #4
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You are not going to "re-sync" or delete files to make DU and DF give you the same answer!! They are each giving you different information about the filesystem / storage device. They are not supposed to give the same answer----What would be the purpose of trying to force them to?


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