NEW YORK - Linux vendors are under attack. In March, IBM was sued for $1 billion by The SCO Group, of Lindon, Utah, which claims IBM has put SCO's Unix code into Linux, the open-source software program. SCO also has sent letters to 1,500 large companies warning them that if they are using Linux, they may face legal problems. Though IBM is the only company named in SCO's lawsuit, other Linux vendors, like Red Hat and SuSE Linux, could suffer collateral damage. Why You Won't Be Getting A Linux PC The Limitations Of LinuxBoies' Take On LinuxPeopleSoft Jumps On The...