Today, Microsoft removed the SharePoint 2010 June 2011 Cumulative Updates for SharePoint Server, Project Server, etc. Unknown as to why at this point, but they will be reposted.
Trevor Seward is a Microsoft Office Apps and Services MVP who specializes in SharePoint Server administration, hybrid scenarios, and SharePoint Online. He has been working with SharePoint for 16 years from SharePoint 2003 on up, managing environments with terabytes of content for 150,000+ user organizations. Trevor is an author of Deploying SharePoint 2016 and Deploying SharePoint 2019. You can find him on Twitter and in /r/sharepoint.