Cesar,
> > > Why a login as root doesn't need a password ?
> > Because it hasn't. Check /etc/passwd.
> I suppose people can add it on /etc/passwd, right?
Use ed or adduser (I recommend adduser).
WARNING: filesystem still has bugs. Don't use ed with a file if
you'll save the file with less information (for example, you just deleted
a line from /etc/passwd). The resulting file will be equal the original
(or truncated). See the UZIX page.
Adriano Camargo Rodrigues da Cunha ([EMAIL PROTECTED])
Engenharia de Computacao - UNICAMP
http://www.adrpage.cjb.net MSX-TR:I have one.And you?
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