A summarised memoirs of Unix-like operating systems showing Linux's origins. Annotation that despite corresponding architectural designs and concepts being shared as part of the POSIX standard, Linux does not share any non-free source code with the original Unix or Minix.

The free software licenses on which Linux is based explicitly accommodate and encourage commercialization; the relationship between Linux Linux Support as a whole and individual vendors may be seen as symbiotic. Sole customary work model of merchandising suppliers is charging for support, especially for employment users. A denominator of companies also hit a specialized pursuit construction of their distribution, which adds proprietary support packages and tools to administer exceptional numbers of installations or to simplify administrative tasks. Another craft model is to give away the software in disposal to sell hardware.