[Wylug-help] rsync over ssh with cron

[Anne Wilson]

I can use a longish command to rsync directories across the lan, from a 
terminal, without the need to give a passphrase, so I tried to set up a cron 
job to do the same at regular intervals.  Up to then I had not understood 
that the cron job would be using a different session and therefore be unable 
to use the authentication link that ssh-add had created.

It seems that if I want to do this automatically I have to use ssh without 
passphrase, but that it is possible to exclude the use of the key from any 
other host.  The answer, I'm told, is in man:sshd.  Sadly, as so often 
happens, if you don't already know quite a bit about what is happening, it is 
very difficult to isolate the bit you require.

Could someone please point me at the bit I need?  An example of how to use it 
would be more than welcome :-)

Anne
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