Last one month i used Ubuntu 11.10 system which i used as a server. I connected it to server and most important things is that when I use multiple SSH to connect, no passwords allowed in here. This happens when i try to login as different users. Normally, I don't like to apply client laptop user name to sign in to work server but when i try to do this task it goes failure. I already sets the public and private key pairs on this connectivity. Can anybody explain what things happens on it? Thanks in advance.