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Subject: Re: attaching a terminal to 'join' another?
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> The next-best is to use the /usr/sbin/watch command to attach to an
> existing tty and see its screen output.  You'll need to rebuild your
> kenel and add the "snp" device (or load it as a module).
>  

not necessariliy build new kernel

sudo kldload snp

will do also