Available Today: Preview Release of the SQL Server ODBC Driver for Linux – SQL Server Team Blog – Site Home – TechNet Blogs
Finally ... MS released ODBC driver for linux, it's a binary, w/out any packging (no RPMs )
Download it here http://www.microsoft.com/download/en/details.aspx?id=28160 , Documents http://msdn.microsoft.com/en-us/library/hh568451%28SQL.110%29.aspx , Blog http://blogs.msdn.com/b/sqlnativeclient/