Campbell, Calif.--Let the Linux marketing begin. TurboLinux, a company backed by Compaq, Dell, Intel and others, has selected 2by4 brand architects to develop a global brand strategy and integrated marketing programs, it was confirmed Monday. The move is the latest by a company that is betting its future on Linux code, an operating system alternative to Microsoft Corp.'s Windows. TurboLinux has already established business in Asia, and now has set its sights on the U.S. market, said Paul Thomas, CEO of TurboLinux, San Francisco. In tapping 2by4 brand architects, Campbell, Calif., TurboLinux gets a company that has been in business for 30 years. Its client list includes IBM, National Semiconductor and Oracle.