For Linux administrators ,SSH is as important ,if not more so, than a watch.
Typing in a password every time a remote connection is established is detrimental to both workflow and security.
Using the tried and tested
cat .ssh/id_rsa.pub | ssh firstname.lastname@example.org 'cat >> .ssh/authorized_keys'
to bypass the password prompt is a great help.
However, it has been found that sometimes this doesnt work, the answer might be the permissions on the ‘authorized_keys’ file.
The solution (on the remote server – after executing the above command)
cd .ssh && chmod 600 authorized_keys
Now logoout and try to re-connect using ssh again
Hope this helps