SSH Transfers Between Servers: Summary
SSH is a unix tool you can use to facilitate secure and fast transfers between servers, or between your desktop and a server. Instead of transferring a file from server A to your PC and then from your PC to server B, you can more directly transfer files from Server A to server B.
You will need SSH credentials for both servers. These credentials include an ID, the server name, port and a password. You will need to get these from your server admin, or your ISP. Once you have these, start a terminal each and “SSH id@servername”. You will be prompted for a password. Once you login your terminal prompt will change, showing you that you’re on a different server. Keep both open. From the receiving server you can do the scp command. This seems the easiest.