Unix（及Linux）的演变历史

如果你想了解Unix（以及Linux）的演变历史，这里强烈推荐阅读两篇文章，陈皓的《Unix传奇》 上篇， 下篇 ，读后你就基本能理解为什么Unix系下有如此多的分支。

Unix族谱

     |--AT&T (1969)-----/

     |                  |

     |              V6 (1976)

     |                  |

     |              V7 (1979)

     |                  |

     |   Novell owns AT&T's Unix (by 1994)

     |     _____________|____________________

     |     |       |      |        |         |

     |    AIX    IRIX    SCO   HP-UX   Solaris 2.X

     |   (IBM)   (SGI)          (HP)     (Sun)

     |

     |

     |--Berkley (1977)-----/

     |                     |

     |                  1BSD (1977)

UNIX-|                     |

     |                4.4BSD (1993)

     |                     |

     |                   Net/2

     |                     |

     |               4.4BSD-Lite (by 1995)

     |     ________________|____________________________________

     |     |       |          |         |          |            |

     |   SunOS   Ultrix   NetBSD    OSF/1   NeXTSTEP   Mac OS X

     |   (Sun)   (DEC)   (Various)  (DEC)    (NeXT)    (Apple)

     |                   (FreeBSD)

     |

     |

     |--Hybrids----/

                   |

                Linux (Various)

                   |

                   |____________________________________________

                   |    |      |          |              |      |

                   | RedHat  Debian  Mandrake   Slackware    S.u.S.E.

                   |                          (Walnut Creek)

                   |

                   |_____________________________________________

                       |        |           |          |        |

                    MkLinux  LinuxPPC  TurboLinux  OpenLinux  CorelLinux

                    (Apple)                        (Caldera)   (Corel)