This section includes information about new enhancements in Novell ZENworks 7.3 Linux Management and information about how to upgrade from earlier versions of ZENworks Linux Management to ZENworks 7.3 Linux Management, ZENworks 7.3 Linux Management with IR1, ZENworks 7.3 Linux Management with IR2, and ZENworks 7.3 Linux Management with IR3, and ZENworks 7.3 Linux Management with IR4.