网络访问行为问题

Question

我的电脑上安装了Debian 64位。问题是，在某些情况下，我只能ping localhost和127.0.0.1，而无法访问外部世界。在其他情况下，我可以在除localhost之外的任何地方切换。

这是/etc/hosts

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    127.0.0.1   localhost
    127.0.0.1   my-pc

    # The following lines are desirable for IPv6 capable hosts
    ::1     localhost ip6-localhost ip6-loopback
    ff02::1 ip6-allnodes
    ff02::2 ip6-allrouters

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这是/etc/network/interfaces

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    # This file describes the network interfaces available on your system
    # and how to activate them. For more information, see interfaces(5).

    # The loopback network interface
    auto lo
    iface lo inet loopback

    # The primary network interface
    allow-hotplug eth0
    iface eth0 inet static
        address 192.168.5.65
        netmask 255.255.255.0
        network 192.168.5.0
        broadcast 192.168.5.255
        gateway 192.168.5.1
    # dns-* options are implemented by the resolvconf package, if installed
        dns-nameservers 192.168.5.1 8.8.8.8 4.4.4.4

    #iface eth0 inet static
    #   address 192.168.5.65
    #   netmask 255.255.255.0
    #   gateway 192.168.5.1
    #auto eth0

    #allow-hotplug eth0
    #iface eth0 inet dhcp

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这是/run/network/ifstate

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    lo=lo
    eth0=eth0

=======================================

重新启动后，ping localhost失败，ping [rest of the world]工作。但是在网络服务重新启动之后，只有ping localhost才能工作。

Answer 1

解决方案

文件/etc/nsswitch.conf必须存在并包含以下行：

    hosts: dns files

在我的案子中它被解决了。不知道为什么，但它是空的！