Transfer file between server using SCP

Someone said that 'this is very easy'

Someone like me said, I can't remember this ... so ... I have to post it

$ scp file_name user@server:/path/to/directory


And, you can transfer file from between another server like this command:

$ scp user_a@server_a:/path/to/file_name user_b@server_b:/path/to/directory

For more information ... use google :P