ssh Error : /usr/bin/ssh-copy-id: ERROR: No identities found

Error : /usr/bin/ssh-copy-id: ERROR: No identities found :

Solution :

Run following command on the client

# ssh-add

If it gives following error.

 Could not open a connection to your authentication agent

To remove this error, Run following command.

# eval `ssh-agent`

Now try to run ssh-add again.

If you are still getting this error, check if you have generated the keys using ssh-keygen.
Read here.