我正在使用虚拟盒运行 Ubuntu 服务器 14.04.4 的虚拟机。我已将网络配置为“桥接适配器”配置。我已手动分配与主机 Windows 计算机所在网络相同地址的 IP。网关是无线路由器。我能够 ping 通公共 IP，并且 URI 也正在转换。
当我尝试使用 安装“chrony”之类的软件包时，sudo apt-get install chrony我立即得到以下输出。
root@controller:~# apt-get install chrony
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Unable to locate package chrony
当我尝试使用更新 apt 时，sudo apt-get update我得到了输出，
root@controller:~# apt-get update
Err http://extras.ubuntu.com trusty InRelease
Err http://extras.ubuntu.com trusty Release.gpg
Unable to connect to extras.ubuntu.com:http:
Err http://archive.canonical.com trusty InRelease
Err http://archive.canonical.com trusty Release.gpg
Unable to connect to archive.canonical.com:http: [IP: 91.189.92.150 80]
Err http://in.archive.ubuntu.com trusty InRelease
Err http://in.archive.ubuntu.com trusty-updates InRelease
Err http://in.archive.ubuntu.com trusty-backports InRelease
Err http://in.archive.ubuntu.com trusty Release.gpg
Unable to connect to in.archive.ubuntu.com:http: [IP: 91.189.88.152 80]
Err http://in.archive.ubuntu.com trusty-updates Release.gpg
Unable to connect to in.archive.ubuntu.com:http: [IP: 91.189.88.152 80]
Err http://in.archive.ubuntu.com trusty-backports Release.gpg
Unable to connect to in.archive.ubuntu.com:http: [IP: 91.189.88.152 80]
Err http://security.ubuntu.com trusty-security InRelease
Err http://security.ubuntu.com trusty-security Release.gpg
Unable to connect to security.ubuntu.com:http: [IP: 91.189.91.23 80]
Reading package lists... Done
W: Failed to fetch http://in.archive.ubuntu.com/ubuntu/dists/trusty/InRelease
W: Failed to fetch http://in.archive.ubuntu.com/ubuntu/dists/trusty-updates/InRelease
W: Failed to fetch http://in.archive.ubuntu.com/ubuntu/dists/trusty-backports/InRelease
W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/trusty-security/InRelease
W: Failed to fetch http://archive.canonical.com/ubuntu/dists/trusty/InRelease
W: Failed to fetch http://extras.ubuntu.com/ubuntu/dists/trusty/InRelease
W: Failed to fetch http://extras.ubuntu.com/ubuntu/dists/trusty/Release.gpg Unable to connect to extras.ubuntu.com:http:
W: Failed to fetch http://archive.canonical.com/ubuntu/dists/trusty/Release.gpg Unable to connect to archive.canonical.com:http: [IP: 91.189.92.150 80]
W: Failed to fetch http://in.archive.ubuntu.com/ubuntu/dists/trusty/Release.gpg Unable to connect to in.archive.ubuntu.com:http: [IP: 91.189.88.152 80]
W: Failed to fetch http://in.archive.ubuntu.com/ubuntu/dists/trusty-updates/Release.gpg Unable to connect to in.archive.ubuntu.com:http: [IP: 91.189.88.152 80]
W: Failed to fetch http://in.archive.ubuntu.com/ubuntu/dists/trusty-backports/Release.gpg Unable to connect to in.archive.ubuntu.com:http: [IP: 91.189.88.152 80]
W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/trusty-security/Release.gpg Unable to connect to security.ubuntu.com:http: [IP: 91.189.91.23 80]
W: Some index files failed to download. They have been ignored, or old ones used instead.
我的/etc/network/interfaces是：
# 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
auto eth0
iface eth0 inet static
address 192.168.0.100
netmask 255.255.255.0
gateway 192.168.0.1
#2nd if
auto eth1
iface eth1 inet static
address 192.168.1.100
netmask 255.255.255.0
#gateway 192.168.0.1
dns-nameservers 8.8.8.8 4.2.2.2
我的/etc/apt/sources.list文件看起来像这样
#deb cdrom:[Ubuntu-Server 14.04.4 LTS _Trusty Tahr_ - Release amd64 (20160217.1)]/ trusty main restricted
#deb cdrom:[Ubuntu-Server 14.04.4 LTS _Trusty Tahr_ - Release amd64 (20160217.1)]/ trusty main restricted
# See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to
# newer versions of the distribution.
deb http://in.archive.ubuntu.com/ubuntu/ trusty main restricted
deb-src http://in.archive.ubuntu.com/ubuntu/ trusty main restricted
## Major bug fix updates produced after the final release of the
## distribution.
deb http://in.archive.ubuntu.com/ubuntu/ trusty-updates main restricted
deb-src http://in.archive.ubuntu.com/ubuntu/ trusty-updates main restricted
## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu
## team. Also, please note that software in universe WILL NOT receive any
## review or updates from the Ubuntu security team.
deb http://in.archive.ubuntu.com/ubuntu/ trusty universe
deb-src http://in.archive.ubuntu.com/ubuntu/ trusty universe
deb http://in.archive.ubuntu.com/ubuntu/ trusty-updates universe
deb-src http://in.archive.ubuntu.com/ubuntu/ trusty-updates universe
## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu
## team, and may not be under a free licence. Please satisfy yourself as to
## your rights to use the software. Also, please note that software in
## multiverse WILL NOT receive any review or updates from the Ubuntu
## security team.
deb http://in.archive.ubuntu.com/ubuntu/ trusty multiverse
deb-src http://in.archive.ubuntu.com/ubuntu/ trusty multiverse
deb http://in.archive.ubuntu.com/ubuntu/ trusty-updates multiverse
deb-src http://in.archive.ubuntu.com/ubuntu/ trusty-updates multiverse
## N.B. software from this repository may not have been tested as
## extensively as that contained in the main release, although it includes
## newer versions of some applications which may provide useful features.
## Also, please note that software in backports WILL NOT receive any review
## or updates from the Ubuntu security team.
deb http://in.archive.ubuntu.com/ubuntu/ trusty-backports main restricted universe multiverse
deb-src http://in.archive.ubuntu.com/ubuntu/ trusty-backports main restricted universe multiverse
deb http://security.ubuntu.com/ubuntu trusty-security main restricted
deb-src http://security.ubuntu.com/ubuntu trusty-security main restricted
deb http://security.ubuntu.com/ubuntu trusty-security universe
deb-src http://security.ubuntu.com/ubuntu trusty-security universe
deb http://security.ubuntu.com/ubuntu trusty-security multiverse
deb-src http://security.ubuntu.com/ubuntu trusty-security multiverse
## Uncomment the following two lines to add software from Canonical's
## 'partner' repository.
## This software is not part of Ubuntu, but is offered by Canonical and the
## respective vendors as a service to Ubuntu users.
deb http://archive.canonical.com/ubuntu trusty partner
deb-src http://archive.canonical.com/ubuntu trusty partner
## Uncomment the following two lines to add software from Ubuntu's
## 'extras' repository.
## This software is not part of Ubuntu, but is offered by third-party
## developers who want to ship their latest software.
deb http://extras.ubuntu.com/ubuntu trusty main
deb-src http://extras.ubuntu.com/ubuntu trusty main
我曾尝试禁用 IPv6 路由。我以前尝试时没有遇到过这样的问题，三天后我感到很困惑。任何见解都将不胜感激。感觉我错过了一些显而易见的事情，但却没有意识到。
非常感谢。
答案1
尝试 ping ' google.com'...如果 ping 失败，则执行以下操作：
编辑/etc/resolv.conf和添加
注意：您可以使用任何文本编辑器，例如“ vi /etc/resolv.conf”
nameserver 8.8.8.8
nameserver 8.8.4.4
位于末尾/etc/resolv.conf- 如果是空文件则位于顶部。
现在应该可以工作了，请在评论中告诉我发生了什么:)
编辑：我注意到在 /etc/network/interfaces 中 - 您已经将“dns-nameservers”字段初始化到 Google 名称服务器，但也请尝试按照我的方法执行此操作 :)
答案2
编辑：好吧！这个解决方案将 100% 修复它（我希望）...因为我尝试使用你的'sources.list' 复制，我遇到了同样的问题...之后，我尝试使用下面的方法恢复默认的 'sources.list'，它100% 工作d（已测试！）：）
好吧，既然您的网络设置没有问题，而且您能够 ping 通所有东西。让我们恢复sources.listUbuntu 安装的默认“ ”文件。
因此，首先删除损坏的“ sources.list”，然后我们将在接下来的步骤中替换它：
sudo rm /etc/apt/sources.list
现在打开' software-properties-gtk'，它将自动创建一个新的空' sources.list'文件
sudo software-properties-gtk
在 ' software-properties-gtk' 中勾选（选中） ' Community-maintained free and open-source software (universe)'
然后将“ Download from:”设置为“ Server for USA”或任何靠近您所在位置的服务器。
当然，请单击“ Revert”按钮。
