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Cant install additional software/packages inside container

(Czezz) #1

Hi, I have just started with Docker only today and I have “beginner”. (hope this is right place to ask).
I have installed my first container like this: docker run -it ubuntu bash

Then I tried to install new package inside of docker container.
I follow some examples that I have google’d and it does not really work to me:

[root@centos7 ~]# docker run -it ubuntu bash
root@2869c7f4bb2e:/# apt-get install htop
Reading package lists… Done
Building dependency tree
Reading state information… Done
E: Unable to locate package htop

What am I doing wrong?

(Kylesoskin) #2

Not doing anything wrong! It just can’t find that package like it says. Which means, either that package doesn’t exist, or you don’t have the repos that contain it.

apt-get update
Then try again

(Czezz) #3

Thanks for that.