Cannot install packages inside docker Ubuntu image

问题:

I installed Ubuntu 14.04 image on docker. After that, when I try to install packages inside the ubuntu image, I'm getting unable to locate package error:

apt-get install curl  Reading package lists... Done Building dependency tree        Reading state information... Done E: Unable to locate package curl 

How to fix this error?

回答1:

It is because there is no package cache in the image, you need to run:

apt-get -qq update 

before installing packages, and if your command is in a Dockerfile, you'll then need:

apt-get -qq -y install curl 

回答2:

From the docs in March 2017:

Always combine RUN apt-get update with apt-get install in the same RUN statement, for example

RUN apt-get update && apt-get install -y package-bar

(...)

Using apt-get update alone in a RUN statement causes caching issues and subsequent apt-get install instructions fail.

回答3:

add following command in Dockerfile: RUN apt-get update

文章来源: Cannot install packages inside docker Ubuntu image