Starting and using services -- Single-user mode -- TECRA_A9-S9017

freebsd_user at freebsd_user at
Sat Sep 6 00:44:21 UTC 2008

Ivan Voras wrote:
> freebsd_user at wrote:
>> I have the need to start and use service while in single_user mode.  To
>> this point I'm not able to use 'top' or 'ps' respectively.  In
> ps is in /bin, top is in /usr/bin ; unless you a) have your PATH wrong
> or b) commonly put /bin on separate file systems, you should be able to
> use ps and others in /bin and /sbin.

>> addition,from the CLI; when I attempt to start services such as
>> 'portmap' and 'sshd' nothing is shown running via 'ps'.  All I see are
>> the headers when I issue th 'ps aux' command.
> Are your world and kernel matched?

This is a failed 4.x to 5.x upgrade which I really don't want to address 
any further.  Currently, as a last effort to save this 'current' install 
I'm doing a 'make buildworld, buildkernel, installkernel and 
installworld as we speak.  Should this fail I'll continue with the topic 
of this discussion = "while in single-user mode, start enough services 
to use 'scp' and 'mv' curcial files over to another machine thereafter 
do a fresh install on the failed box in question.
>> I'm sure its possible to do what I'm attempting, but given the crippled
>> situation of this box, I'm stuck in Single-user mode and need to start
>> enough services that will allow the use of 'scp' in order to move some
>> zipped/crucial files from the crippled box to another machine on the
>> same network.

Until now I've tried fsck -p ; mount -u / ; mount -a -t ufs ; swapon -a

We will try your suggestions once the building finishes (on it own) to 
first see if the new build process has fixed everything (multi-user) 
that was broken and if not, we'll follow your recommendation(s).

> When you enter single user mode, root file system is mounted read-only
> so one of the first things you need to do is "mount -u -o rw /". Next,
> you need to mount your other file systems (/usr is usually a separate
> file system and that's where ssh lives) so do "mount -a". At this point
> you might as well cancel the single-user mode by exiting the shell and
> go multi-user.
> If there are file system errors. "mount -a" will fail and you'll need to
> mount other file systems by hand.

The only errors or warnings we've experienced where listed in the 4.x to 
5.x section of the 5.5 /usr/src/UPDATING file with reference to 
'userland'  The UPDATING said to ignore these errors.  Obviously 
something is seriously wrong with that section on updating from 4.x to 5.x

Enough said, we'll post one way or the other once the build is done.


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