From the ssh man page
BatchMode: If set to “yes”, passphrase/password querying will be disab
+led.  This option is useful in scripts and other batch jobs where no 
+user is present to supply the password. The argument must be “yes” or
+ “no”.  The default is “no”.

[download]
So running 
ssh -o BathMode=yes user@host.with.key.exghange "command"

[download]
Should do the business

In reply to Re: ssh connection by Utilitarian
in thread ssh connection by muizelaar

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