7) sudo visudo and comment the line "Defaults .requiretty"
8) Create a user called vagrant and set the password as vagrant. Commands to use are useradd vagrant. And passwd vagrant.
I always wanted to make the ACS work in an Azure webrole. Somehow I was not able to put a sample together.
Seems like someone else has done it for us . Check http://social.technet.microsoft.com/wiki/contents/articles/2590.aspx for step by step guide on how would you deploy azure ACS authenticated webrole on Azure.