[mythtv-users] Adding new channels

John Veness John.Veness.myth at pelago.org.uk
Sat Feb 16 16:40:06 UTC 2008


Michael T. Dean wrote:
> On 02/13/2008 10:51 AM, Jon wrote:
>>> You can ssh to your backend from a machine with a display with X
>>> forwarding (either the -X or -Y option, I'm never quite sure) and run
>>> mythtv-setup, with the GUI appearing on the machine running the ssh  
>>> client.
>> On my powerbook running X11, it's ssh -X. I think it's -y on some  
>> systems though. (which might explain your confusion)
> 
> It's -Y on any modern OpenSSH.  If you're using OpenSSH and it doesn't 
> have -Y, you /need/ to upgrade because the version you're using has many 
> security issues.
> 
> -X is slower than -Y and all -X does is silly things (that don't apply 
> to MythTV apps running on your own network) like preventing the MythTV 
> application from capturing keystrokes sent to other applications or 
> grabbing the window contents from other windows (i.e. it prevents Myth 
> from grabbing the contents of your browser window when you're connected 
> to your online banking application).  I've seen the MythTV code (and you 
> can see it, too).  Myth doesn't do anything like that, so running with 
> -X only slows things down and causes errors, and can potentially cause 
> applications to crash.
> 
> Also, with -Y, you can use the clipboard--which is /really/ nice for 
> typing in passwords or paths or ...
> 
> So, use -Y.  -X is meant for connecting to an untrusted host (i.e. 
> you're helping someone else configure his MythTV system across the 
> Internet and you don't know whether his hosts may have rogue programs 
> running on them).
> 
> Mike

That's a really useful summary, thanks. I see that -X is slower and more 
secure and not necessary in a controlled environment, but I'm intrigued 
why you say it might cause errors and cause things to crash. Why would 
that be?

Cheers,

John

-- 
John Veness, MythTV user, UK, DVB-T


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