rsync over OpenSSH error

[Garry Knight]

Until recently I've been using rsync between my laptop and PC without any
problems. Both run Kubuntu 6.06 LTS Dapper Drake.

Just recently, when trying to sync directories across machines, I've been
getting the following error (on the machine on which I start the rsync):

Permission denied (publickey, keyboard-interactive).

I'm not an expert on rsync or ssh, but this looks like an error returned by
ssh. On both machines, I'm using version 1:4.2p1-7ubuntu 3.1 of
openssh-client and the same version of openssh-server, and version
2.6.6-1ubuntu2 of rsync.

As I said, I'm not an expert, and I've looked at ssh_config on both machines
until I'm blue in the face (well, a darker shade of pink...) and can't
think what's going on.

-- 
Garry Knight
garryknight at gmx.net