cat: /dev/mem: Operation not permitted

Norberto Bensa nbensa at
Sun Mar 15 12:53:48 UTC 2009

On Sun, Mar 15, 2009 at 7:43 AM, Mario Vukelic
<mario.vukelic at> wrote:
> On Sun, 2009-03-15 at 10:57 +0200, Dotan Cohen wrote:
>> cat: /dev/mem: Operation not permitted
> I'm pretty sure this is a restriction enforced by AppArmor.

It's a feature.

Ubuntu kernels are compiled with CONFIG_STRICT_DEVMEM.

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