From Wikipedia, the free encyclopedia
Red hat or Red Hat may refer to:
- Red Hat, Inc. a company dedicated to open source software such as Linux
- Red Hat Linux, a former product of Red Hat, Inc., now replaced by Red Hat Enterprise Linux
- Red Hat sect, a classification of schools of Tibetan Buddhism
- Red Hat Society, a woman's social organization
- Galero, a red hat historically bestowed upon Catholic cardinals
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