Re: [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
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