rsync causing disk sleeps and loss of apps

[Anne Wilson]

On Sunday 30 January 2011 18:38:04 Patrick O'Callaghan wrote:
> On Sun, 2011-01-30 at 15:23 +0000, Anne Wilson wrote:
> > I'm trying to get rsync to operate on a number of directories, but not
> > in a
> > mirror situation where I can easily use an existing app.  I therefore
> > wanted
> > to set up a shell script which can be run over the network using
> > keychain to
> > provide the necessary passwords.  On a single box it works perfectly,
> > but of
> > course the network makes it more complicated.
> > 
> > Part of the problem may be that I have followed too many how-tos, and
> > set
> > things up in a way that fight.  First, to get keychain correctly
> > running -
> > 
> > Keychain is set up in .bash_profile and works.  Then I read that if
> > you are
> > going to run a script with cron you need to eval keychain within your
> > script
> > as it works in its own restricted environment.  This makes sense - but
> > does
> > that cause problems when I run tests in bash, since keychain is
> > already
> > running?
> 
> I think you're going about this the wrong way. AFAIK keychain is the KDE
> equivalent to Gnome's seahorse, i.e. an encryption manager designed to
> handle multiple keys for online sessions in a user-friendly way. However
> what you actually need for secure backup with rsync is simply SSH using
> RSA authentication, which doesn't require a password. Just generate a
> key pair (man ssh) and use the id_rsa file for authentication, running
> the cronjob as yourself and not root.
> 
That's exactly what keychain is/does.  The rsa authentication takes care of 
password requirements.  That's why I'm using it.

Anne
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