我正在尝试安装一些软件包，命令是：
sudo apt-get install nginx-extras passenger
但后来我收到了一个错误：
Reading package lists... Done
Building dependency tree
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:
The following packages have unmet dependencies:
nginx-extras : Depends: nginx-common (= 1:1.6.2-9.5.0.4~trusty1) but it is not going to be installed
Depends: perl (>= 5.18.2-2ubuntu1) but 5.14.2-21+deb7u2 is to be installed
Depends: perlapi-5.18.2 but it is not installable
Depends: libc6 (>= 2.14) but 2.13-38+deb7u8 is to be installed
Depends: libgd3 (>= 2.1.0~alpha~) but it is not installable
Depends: libperl5.18 (>= 5.18.2) but it is not installable
Recommends: passenger (< 5.0.5) but 1:5.0.4-1~trusty1 is to be installed
passenger : Depends: libc6 (>= 2.14) but 2.13-38+deb7u8 is to be installed
Recommends: passenger-doc (= 1:5.0.4-1~trusty1)
Recommends: passenger-dev (= 1:5.0.4-1~trusty1) but it is not going to be installed
E: Unable to correct problems, you have held broken packages.
我不知道该如何解决这个问题，我确实认为我需要安装一些软件包，但是所有这些呢？
提前致谢！
答案1
我遇到了同样的错误并且已修复。
我想你遵循的指南和我是一样的（https://gorails.com/deploy/ubuntu/14.04)，并且这个只有在使用 14.04 时才有效。你使用的是什么版本和发行版？执行 即可找到它cat /etc/*-release。
如果您查看 VERSION，它看起来像这样VERSION="7 (wheezy)"。您需要做的下一步是以/etc/apt/sources.list.d/passenger.listroot 身份编辑。因此，您可以sudo vim /etc/apt/sources.list.d/passenger.list更改
deb https://oss-binaries.phusionpassenger.com/apt/passenger trusty main
到
deb https://oss-binaries.phusionpassenger.com/apt/passenger <Your version> main
就我而言
deb https://oss-binaries.phusionpassenger.com/apt/passenger wheezy main
然后执行“sudo apt-get update”现在你应该能够安装 nginx-extras 乘客