Secure Shell: Logging In Without Password After Placing Public Key on Remote Server

Command:

$ ssh remote.servername.com
Welcome to Ubuntu 16.04 LTS (GNU/Linux 4.4.0-22-generic x86_64)

 * Documentation:  https://help.ubuntu.com/
Last login: Thu Jun  9 21:33:51 2016 from 123.456.789.01