On Tue, 2014-07-29 at 14:21 -0500, Jacob Burkamper wrote:
> dpkg -l aufs-tools gives the following output:
> 
> Desired=Unknown/Install/Remove/Purge/Hold
> |
> Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
> |/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
> ||/ Name                        Version                     Description
> +++-===========================-===========================-======================================================================
> ii  aufs-tools                  1:3.0+20111101-1ubuntu1     Tools to manage
> aufs filesystems
> 
> The $AUFS_VERSION variable gives "3.x-rcN-20111205", dpkg shows the package
> version as "1:3.0+20111101-1ubuntu1", and modinfo aufs gives the module as
> version "3.13-20140303". Which is to be believed? There is a big difference
> between December 2011 and March 2014.

Ubuntu (and Debian) packages the aufs module as part of the kernel, so
its version can easily be inconsistent with the userland aufs-tools
package.

When you say the $AUFS_VERSION variable, do you mean the macro
definition in /usr/include/linux/aufs_type.h?  This is built from the
kernel source but can again be a different version from the installed
kernel (it's in the linux-libc-dev package).

So, which to believe?  All of them, as they refer to different parts of
aufs...

Ben.

-- 
Ben Hutchings
Larkinson's Law: All laws are basically false.

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