For big companies that want to use the Linux operating system and get business-level support, there are only two main options: Red Hat Inc. and Novell. And one of those looked shaky last week. After two years of refocusing, reinvention, and restructuring, Novell is reducing its staff by 10% to save money and suggesting that a change in CEO may be on the horizon. It's all part of trying to deliver on the growth promised when the company staked its future on open-source software in 2003. Novell's profits were up substantially between fiscal 2003 and 2004. But profits have slipped...