SCO Linux 4

SCO Linux 4 provides the bare bones of a high-availability clustering solution.

SCO Linux 4 is licensed on a per-server basis, with four levels of support: base for $599, classic for $699, business for $1,249 and enterprise for $2,199. This price structure is similar to Red Hat Advanced Server's, but it is slightly less expensive at each price level. (At press time, Red Hat announced a lower server price point: Red Hat Enterprise Linux ES Base Edition is $349.)

UnitedLinux 1.0, upon which SCO Linux 4 is based, has some rough edges. SCO hasn't smoothed them out yet, and their available documentation isn't much better than you can get by surfing the Internet. On the other hand, with Webmin and APT, it should be easy to keep your servers humming once you do have them set up. Except for that one scary security situation, the tech support is good.

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Steve R. Hastings first used UNIX on actual paper teletypes. He enjoys bicycling with his wife, listening to music, petting his cat and making his Linux computers do new things.