Linux Ssh key pair

I'm really confused about RSA keys and using them to ssh from one machine to another without password.  I'm using UNIX/Linux on both machines.

I have 2 servers.  I want server 1 to ssh into server 2 without password using public/private keys.  I don't want server2 to ssh into server1.  It's just one way.

Where do I generate the key that the other server gets?  Server 1 or Server 2 and why?

I'm using ssh-keygen.  Some sources say to generate the key on Server 1 and other on Server  2.  Which is it?
lcorAsked:
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chakkoConnect With a Mentor Commented:
I have done this for Windows based client to Linux host.

This page has good instructions and may help you with your task.

http://www.howtoforge.com/ssh_key_based_logins_putty

you need to put the public key into the authorized_keys2 file on the linux server, you can control which server the access is allowed.  So just edit the file for the server you want to access.
Note:  the name of the file may be different for your linux, but it should be located in the same location.
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