How to set enforcing to 0?

[Paul Smith]

On Sun, Jan 27, 2013 at 11:07 AM, Paul Smith <phhs80 at gmail.com> wrote:
>>> Welcome to emergency mode. Use "systemctl default" or ^D to enter default
>>> mode.
>>> Give root password for maintenance
>>> (or type Control-D to continue)
>>> sulogin: /root: change directory failed: Permission denied
>>
>> Thank you.  Whenever I see a question like that with no explanation I get
>> suspicious that somebody's trying to be a cargo cult sysadmin, trying a
>> drastic "solution" that they don't understand because "it worked ten years
>> ago."
>>
>> You might try booting from a LiveCD, chrooting and running restorecon on
>> /root.  And, while I'm thinking about it, why does your boot process need to
>> log in as root?  Is this something normal that I've never noticed, or
>> something odd?
>
> Thanks, Joe. I do not know why it tries to login as root -- my
> installation is merely a F18 clean installation. I strongly believe
> that the problem I am experiencing is being caused by the new selinux
> update.
>
> Is there some way of disabling selinux in the emergency mode and
> getting the machine booting without selinux active?

By running journalctl, I got the following:

kernel: ata1.00 exception emask 0x0 SAct 0x0 action 0x0
kernel: ata1.00: BMDMA stat 0x24
kernel: ata1.00: failed command: READ DMA EXT

Any ideas?

Paul