How to Enable PasswordLess SSH and Hostbased SSH in linux

This video shows how to enable Passwordless authentication of SSH in Centos or RHEL or Ubuntu. HostBased Authentication is also covered here in this video. This SSH feature is useful in HPCC cluster setup and it is also very much useful if an user connect to a remote server in a regular basis. Basically, users don't have to put password every time they login to the remote server. There are also many areas where this feature can be applied.