CentOS - Feb 2015 - move a disk to another machine

I have a centos 6.6 laptop which is having trouble (intermittent boot failures,
or more rightly so, multiple failures, intermittent booting). The laptop is
running selinux.
I pulled the second internal disk out to get my data off of it. I plugged it
into my centos 5.x machine and mounted it. I was able to do a dir listing, but
whrn I tried to cd into any of the directories, I get a bunch of AVC denials,
and I can't see any files. The contos 5.x machine is selinux enforcing, and
so
is the centos 6.x box. The files are all owned by me, and have the same uid/gid
on both boxes.

What is the right way to do this?

Meanwhile, I put it back into the laptop, and kept attempting to boot the
machine, until I got lucky and it came up. I was able to rsync the data off the
drive, so this isn't a crisis, just a learning moment.

thanks,
-chuck

--

Chuck Campbell wrote:
> I have a centos 6.6 laptop which is having trouble (intermittent boot
> failures, or more rightly so, multiple failures, intermittent booting).
The laptop
> is running selinux. I pulled the second internal disk out to get my data
off of
> it. I plugged it into my centos 5.x machine and mounted it. I was able
to do a
> dir listing, but whrn I tried to cd into any of the directories, I get a
bunch of AVC
> denials, and I can't see any files. The contos 5.x machine is selinux
enforcing,
> and so is the centos 6.x box. The files are all owned by me, and have
the same
> uid/gid on both boxes.
>
> What is the right way to do this?
<snip>
My reaction would have been simple: set selinux to permissive on your
machine, back up what you wanted, then return it to enforcing.

       mark

On 2/26/2015 12:33 PM, m.roth at 5-cent.us wrote:
> Chuck Campbell wrote:
>> I have a centos 6.6 laptop which is having trouble (intermittent boot
>> failures, or more rightly so, multiple failures, intermittent booting).
> The laptop
>> is running selinux. I pulled the second internal disk out to get my
data
> off of
>> it. I plugged it into my centos 5.x machine and mounted it. I was able
> to do a
>> dir listing, but whrn I tried to cd into any of the directories, I get
a
> bunch of AVC
>> denials, and I can't see any files. The contos 5.x machine is
selinux
> enforcing,
>> and so is the centos 6.x box. The files are all owned by me, and have
> the same
>> uid/gid on both boxes.
>>
>> What is the right way to do this?
> <snip>
> My reaction would have been simple: set selinux to permissive on your
> machine, back up what you wanted, then return it to enforcing.
>
>        mark
>
> _______________________________________________
> CentOS mailing list
> CentOS at centos.org
> http://lists.centos.org/mailman/listinfo/centos
>
Hah, I didn't actually think of that. If it is that simple, then live and
learn.
I had thought there were differences between 5.x and 6.x that were causing the
problem, since the uid/gid are the same on both boxes for the file owner. There
must have been something in the xattrs that didn't line up...

thanks,
-chuck



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On Thu, Feb 26, 2015 at 10:49 AM, Chuck Campbell <campbell at
accelinc.com> wrote:
> I have a centos 6.6 laptop which is having trouble (intermittent boot
failures,
> or more rightly so, multiple failures, intermittent booting). The laptop is
> running selinux.
> I pulled the second internal disk out to get my data off of it. I plugged
it
> into my centos 5.x machine and mounted it. I was able to do a dir listing,
but
> whrn I tried to cd into any of the directories, I get a bunch of AVC
denials,
> and I can't see any files. The contos 5.x machine is selinux enforcing,
and so
> is the centos 6.x box. The files are all owned by me, and have the same
uid/gid
> on both boxes.
>
> What is the right way to do this?
Mount with a permissive context:
mount -o context=unconfined_u:object_r:default_t

If you mount without that, ls -Z will show you the labeling and you
can probably figure out why you're getting the denials based on the
AVC message.


-- 
Chris Murphy