I'm using ssh-agent for caching private keys; it's working well before connecting remote PC its not asking for a PASSPHRASE but its asking remote user password. Ex:
host$ sudo ssh-agent bash
sudo ssh localhost2.localdomain
after that its not asking passphrase its asking only remote user password.
With that sudo, you are switching user to root. I suspect that was not intended, as ssh will then go looking for keys in /root/.ssh/ and, finding no applicable key there, will just ask for remote user password.
I usually run exec ssh-agent bash or similar – remaining then with my own user.
And then I run ssh-add, to load (most of) my keys into the agent, before running ssh – again usually without sudo.
If I'm wrong, and the sudo was intentional, can you tell us what you are trying to achieve thereby?
