[CentOS] du vs df size difference

Robert Heller heller at deepsoft.com
Thu Oct 1 18:35:20 UTC 2009


At Thu, 01 Oct 2009 10:13:26 -0400 CentOS mailing list <centos at centos.org> wrote:

> 
> Peter Kjellstrom wrote:
> > One possibility is that the missing data is hiding under a mount-point in the 
> > normal case.
> > 
> > /Peter
> 
> So what you're saying is something is mounted on to a directory that had 
> data in it before the mount.  How do I see the data being hidden without 
> unmounting the point?

You can't.  You must unmount.  You should be able to do this from
single user mode if the file system cannot be unmounted under multiuser
mode (eg /usr, /var, etc.).  Usually other mount points can be
unmounted, but depends on what is running on the system at the time. 
Unmounting /home would require that you kick all users off for example,
unmounting /var/www would require stopping apache, etc.

> 
> Thanks,
> 
> Ryan
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>                                                                                               

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