"It's not what you know that hurts you, It's what you know that ain't so." Will Rogers... Will would say, "STIFF THE FED"!!!
From: GNU bug Tracking System <help-debbugs@...>
To: George R Goffe <grgoffe@...>
Sent: Tuesday, February 21, 2012 9:27 AM
Subject: bug#10863: closed (Re: bug#10863: A possible du bug?)
Your bug report
#10863: A possible du bug?
which was filed against the coreutils package, has been closed.
The explanation is attached below, along with your original report.
If you require more details, please reply to 10863@....
On 02/21/2012 05:22 AM, George R Goffe wrote:
> I'm running the du command from / and am seeing other file systems even though -x is specified.
> Here's the full command + args: du -xs -- .??* * | sort -k1nr | more
> Am I doing something wrong or misunderstanding something?
There's your problem. -x applies to each command line argument, but you
are passing multiple command line arguments. Therefore, you are
computing the disk usage of /usr and all subdirectories within the same
device as /usr, of /opt and all subdirectories within the same device as
/opt, and so forth.
If you really wanted to compute the usage of just / and all
subdirectories on the same device as /, then use du -x /, not du -x /*.
I'm closing this out as not a bug, as the du was doing what it was asked
after the shell glob expansion is taken into account.
Side note - your glob does not list all files. It's possible to name a
file '.a', which matches neither '.??*' nor '*'. To properly catch
_all_ files, you need three globs, as in '.??* * .[!.]'.