> > useradd -m -s /bin/sh dnscache
> > pwd_mkdb: warning, unknown root shell
> > pwd_mkdb: warning, unknown root shell
> >
> > Any pointer for unknown root shell, I have specified /bin/sh is its
shell thought.
>
> Is the shell you have set for your root account in /etc/shells?

/bin/sh is in my /etc/shells as default.

David Kwok