Firstly I have tried google but I'm not finding what I need 
Ok, all's I want to do is SSH onto my webserver and I'm having trouble
Stupid I know. Between the linux/osx commands I'm all a bit wtf? I use SSH on my mac like once every few months tops and the commands have escaped me somewhat.
Here is what I thought it was
1) ssh -U [email protected]
ort number
Since then i've tried:
2) ssh -U username www.domain.com:port number
3) ssh domain.com
ort number -U username
4) all of the above with lowercase "u" and also "l" in place of the "u" since I found that on a site
Someone please put me out of my misery.

Ok, all's I want to do is SSH onto my webserver and I'm having trouble

Here is what I thought it was

1) ssh -U [email protected]

Since then i've tried:
2) ssh -U username www.domain.com:port number
3) ssh domain.com

4) all of the above with lowercase "u" and also "l" in place of the "u" since I found that on a site

Someone please put me out of my misery.