I have a simple backup system : a remote system periodically tars some
important
data, and notifies a server that it should read those files. The
server then
tries to read the files:
su - --command="scp URL:/path/filename.tjz
/backup-path/filename.tjz" backupUser
Until mid-May, this was working great. Keychain had been invoked so
that this could operate without user intervention. However now the
scp operation is
asking for a password, which the script does not have. If done
manually, the
operation works.
In trying to resolve this, I've not found how to interrogate the
ssh-agent to
determine what keys it has access to. So first question - is there
some way
to determine that?
One probably-more-than-a-coincidence is that the failure began on
rebooting the
remote system, probably due to a kernel/security update. It's running
Etch/2.6.18.
As it would seem to be the server rather than the remote system that
was rebooted,
I'm mystified as to why any kernel change (and these are self-compiled
kernels)
on the remote system would have any effect on this operation.
Any clues - including references to man pages possibly overlooked -
would be
appreciated. TIA!