在我的Docker容器构build过程中，我尝试使用apt-get install来安装一些软件包。 然而，这个过程没有完成，因为4个包中的3个找不到。
Step 1 : RUN apt-get update && apt-get install -y netcat ca-certificates build-essential libssl-dev ---> Running in 38d22d97ec4a Err http://http.debian.net jessie InRelease Err http://http.debian.net jessie-updates InRelease Err http://security.debian.org jessie/updates InRelease Err http://http.debian.net jessie Release.gpg Could not resolve 'http.debian.net' Err http://security.debian.org jessie/updates Release.gpg Could not resolve 'security.debian.org' Err http://http.debian.net jessie-updates Release.gpg Could not resolve 'http.debian.net' Reading package lists... W: Failed to fetch http://http.debian.net/debian/dists/jessie/InRelease W: Failed to fetch http://http.debian.net/debian/dists/jessie-updates/InRelease W: Failed to fetch http://security.debian.org/dists/jessie/updates/InRelease W: Failed to fetch http://http.debian.net/debian/dists/jessie/Release.gpg Could not resolve 'http.debian.net' W: Failed to fetch http://http.debian.net/debian/dists/jessie-updates/Release.gpg Could not resolve 'http.debian.net' W: Failed to fetch http://security.debian.org/dists/jessie/updates/Release.gpg Could not resolve 'security.debian.org' W: Some index files failed to download. They have been ignored, or old ones used instead. Reading package lists... Building dependency tree... Reading state information... E: Unable to locate package netcat E: Unable to locate package build-essential E: Unable to locate package libssl-dev Removing intermediate container 38d22d97ec4a 2015/08/10 12:03:07 The command [/bin/sh -c apt-get update && apt-get install -y netcat ca-certificates build-essential libssl-dev] returned a non-zero code: 100 起初，我认为这是我的基本形象的问题，但是我没有问题在另一个虚拟机上构build容器。 思考？
我在一个基于同样问题的新问题中找到了这个答案，并为我解决了这个问题。
$ docker-machine restart default # Restart the environment $ eval $(docker-machine env default) # Refresh your environment settings
Mark Smith提供的答复。
这个问题围绕着主机的网络配置。 eth0接口配置不当。 以下命令帮助我确定这是一个DNS问题。
$ docker run --rm debian:jessie ping -c 5 google.com ping: unknown host $ docker run --rm debian:jessie ping -c 5 8.8.8.8 PING 8.8.8.8 (8.8.8.8): 56 data bytes 64 bytes from 8.8.8.8: icmp_seq=0 ttl=38 time=37.147 ms 64 bytes from 8.8.8.8: icmp_seq=1 ttl=38 time=32.917 ms 64 bytes from 8.8.8.8: icmp_seq=2 ttl=38 time=31.475 ms 64 bytes from 8.8.8.8: icmp_seq=3 ttl=38 time=30.692 ms 64 bytes from 8.8.8.8: icmp_seq=4 ttl=38 time=31.180 ms --- 8.8.8.8 ping statistics --- 5 packets transmitted, 5 packets received, 0% packet loss round-trip min/avg/max/stddev = 30.692/32.682/37.147/2.352 ms