Practicality of backing up huge hard drives (was Re: [mythtv-users] Dieing Hard Drive)

[Brian J. Murrell]

On Tue, 2005-03-15 at 10:59 -0500, Neil Watson wrote:
> On Tue, Mar 15, 2005 at 10:43:47AM -0500, Brian J. Murrell wrote:
> >IMHO, the right way to do this is to use the "forced command" option in
> >the authorized_keys file.  See the manpage for sshd under the
> >"AUTHORIZED_KEYS FILE FORMAT" section and create a key on the backup
> >server that is forced to run only one command and then use the private
> >portion of that key without a passphrase on your client.
> 
> That is very interesting.  Does that mean I could have a key pair
> without a passphrase?

Sure.

> The account on the public server could have no
> shell access?

I believe so.

> A connection would automatically execute a command
> without a shell?

Hrm.  I don't recall if the command in the authorized_keys file is
executed directly (as in execve()) or through a shell (as in system()).

> Do you have an example of how a remote rsync or other
> type of backup would use this feature?

I'm afraid I don't.  If this is what you want to do, look at Bill
Stearns' rsync-backup-server/rsync-backup-client tool(s).

b.

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