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I have a folder with 40 GB of dozens of directories and stuff, and I want to see the exact size of the root folder in bytes ..

I have tried using this, but it shows the size in kilobytes:

du -s foldername

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up vote 8 down vote accepted

Use the -B1 parameter to du:

du -s -B1 foldername
$ man 1 du
 -B, --block-size=SIZE
          use SIZE-byte blocks

You could also try the --apparent-size flag

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Thanks man .. ! – Ahmad Feb 16 '12 at 19:40

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