Can I add a link or attach a file to the message?

Dux-Soup does not support file attachments. However, you can add a link when you are sending direct messages to your 1st-degree connections. 

They will get a clickable link in their message.

Just type in the URL in the message:

Your contact will get the following message: 

If you are sending a connection request to your 2nd and 3rd degree connections, you cannot add a clickable link - it will appear as text and the end receiver will not be able to click on it.