编辑 vim /etc/hosts 配置 host 映射
    给 zjj101 映射到: 10.11.8.101

    1. 127.0.0.1   localhost localhost.localdomain localhost4 localhost4.localdomain4
    2. ::1         localhost localhost.localdomain localhost6 localhost6.localdomain6
    4. 10.11.8.101 zjj101

    配置完了不用做别的配置, 保存完了就生效了.