Novell serves up an operating system winner with SLES 9

Our tests of Novell's SuSE Linux Enterprise Server Version 9 - we tested revision 9.1 of the server software - show it to be polished, faster and supporting a wider breadth of applications than previous versions we've tested. These advances are underscored by improved administration tools, compatibility with several CPU configurations, and connectivity with Novell-based add-on management and policy enforcement applications.

This version of Linux - which earns our Clear Choice Test designation - could make Windows administrators who are still hesitant about widespread Linux deployment to take serious notice.

Organizations using Microsoft's ASP.Net application infrastructure can port their applications to SLES 9 via the new SuSE Linux software developers kit. Novell's acquisition of Ximian brings a C# compiler to SLES 9 and compatibility with ASP.Net Web applications.

SLES 9 performs numerous dependency checks at application installation time via a revamped administrative interface, still called YaST (Yet Another SetUp Tool). Adding server applications and updates is simplified and safer. SLES 9 contains many server service-oriented applications, such as DHCP, PostFix Mail and DNS, as have prior editions. This isn't a case of distribution becoming bloated, but the basic expectation set by Novell is that this server operating system fits several network and application server profiles.

Hardware detection has improved over previous SuSE Linux versions (see SuSE Linux 8.0 test). We installed it on several typical server platforms (see How we did it) and found that when a hardware vendor supplied a driver kit, detection improved dramatically. But when they didn't supply the kits, we received odd errors. SLES 9 displayed incorrect default kernel choice information when we installed natively on an HP DL360G3 dual-CPU server, but actually installed the right kernel. We found no abnormalities in hardware compatibility.

The default server applications installed comprise a minimal set of programs identical to all three supported CPU platforms. Happily, run levels and defaults initially were installed with the most conservative possible settings.

We applaud this methodology, as it forces administrators to choose what services will be available rather than turning them on automatically and causing potential security or network services interaction problems. Updated applications don't affect already-chosen defaults or subsequent security-oriented settings. Subsequent downloads can be spawned manually, or automatically through the YaST Online Updater server, citing either an internal or SuSE.com update source.

Most installers will choose more applications than the default settings provide, however. Making additional choices via YaST before or after installation - such as adding FTP support - puts in the desired application and checks dependencies so other libraries or components are also correctly chosen.