1. centos系统官网

    https://www.centos.org/download/

  2. redhat系统官网

    https://www.redhat.com/zh

  3. ubuntu系统官网

    https://ubuntu.com/download/server

  4. windows系统官网

    http://www.microsoft.com/zh-cn/default.aspx

  5. solaris下载

    https://www.oracle.com/solaris/solaris11/downloads/solaris-downloads.html


    除了上述官网下载,国内也有公用的下载地址

    http://mirrors.163.com/

    https://www.huaweicloud.com/theme/62428-3-H-undefined