[FAQ pointer] Re: How to start single user mode or safe mode

[Stephen Liu]

- snip -

>>Kindly advise how to boot to 'single user mode' or 'safe mode'
>>    
>>
>
>The precise answer depends on what version of FreeBSD you're running,
>which you failed to mention.  You can work it out from the FreeBSD FAQ
>entry titled "I made a mistake in rc.conf, or another startup file,
>and now I cannot edit it because the filesystem is read-only. What
>should I do?", which you can read at:
> http://www.freebsd.org/doc/en_US.ISO8859-1/books/faq/admin.html#RCCONF-READONLY
>
Hi Lowell,

V5.2
===

Thanks for your advice.  Problem was solved as follow;

 ......
Enter full pathname of shell or RETURN for /bin/sh: <ENTER>
# mount -a -t ufs
# ee /etc/rc.conf

Now another problem popup.

At rebooting
.....
/tmp not clearly dismounted
/var not clearly dismounted
/usr not clearly dismounted
...
...
Starting syslog
...
Recovering vi editor session:

It hanged here.  Kindly advise how to umount /tmp, /usr and /var

If I need to run 'fsck' whether starting single user mode will mount / at read only.  From there I can run

# fsck /dev/ad4s1a  (I suppose boot)
# fsck /dev/ad4s1b  (I suppose swap)
# fsck /dev/ad4s1c  (I suppose /)

Kindly advise how to re-check the device, boot, swap and /

TIA

B.R.
Stephen