Instructions on setting up ssh without a password and debuging possible errors.

Connecting from Client to Server as User on port Port.

1. Prepare server:

   #First login to server
   ssh -p Port User@Server
   # Correct file permissions
   chmod 700 ~
   chmod 700 ~/.ssh
   chmod 600 ~/.ssh/authorized_keys
   # Get back to Client
   exit

2. Create a key:

   ssh-keygen -t rsa #Leave the password empty 

3. Copy the public key to the Server

   ssh-copy-id  -i ~/.ssh/id_rsa -p Port  User@Server

4. Verify its working:

   ssh -p Port User@Server 

Troubleshooting ssh without a password

1. Try connecting in verbose mode and watch for errors

   ssh -vvv -p Port User@Server

2. SSH error : Permissions 0777 for “file” are too open.

   chmod 644 ~/.ssh/*.pub # permissions for public keys
   chmod 600 ~/.ssh/private_key ~/.ssh/{config,known_hosts,authorized_keys} # permissions for private key  & configs

3. SSH error : Bad owner or permissions on FILE

   chown -R $USER ~/.ssh/

More instructions & information: http://www.thegeekstuff.com/2008/11/3-steps-to-perform-ssh-login-without-password-using-ssh-keygen-ssh-copy-id/