Red hat Linux:-

Red hat is main distributor of Linux.Red hat Started in 1994 by “Marc Ewing”U.S.A based Company.Red hat was largest Linux promoter in whole world (1994-98). In India Linux was introduced by Red hat in 1998According to growth in (1994-98) Red hat started Certifications in 1998 :-

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RHCT :- Red hat Certified Technician.RHCE :- Red hat Certified Engineer.RHCSS :- Red hat Certified Security Specialist.RHCA :- Red hat Certified Architect.

It is popular by RHCE.