The following are some of the docker Images present in my system:

```
root@labadmin-VirtualBox:/home/labadmin# docker images
REPOSITORY   TAG     IMAGE ID            CREATED               SIZE
ubuntu      14.04   1e0c3dd64ccd        13 days ago         187.9 MB
ubuntu     latest   45bc58500fa3        5 weeks ago         126.9 MB

```

I want to install "smartmontools" in the container. But it is throwing an error " Unable to locate package smartmontools" as below :

```
root@labadmin-VirtualBox:/home/labadmin# docker run -it 1e0c3dd64ccd
root@b4954826a227:/# apt-get install smartmontools
Reading package lists... Done
Building dependency tree       
Reading state information... Done
E: Unable to locate package smartmontools
root@b4954826a227:/# exit
exit

```

But when I do the same in Ubuntu machine it is working.

```
root@labadmin-VirtualBox:/home/labadmin# apt-get install smartmontools
Reading package lists... Done
Building dependency tree       
Reading state information... Done
***smartmontools is already the newest version.***
0 upgraded, 0 newly installed, 0 to remove and 542 not upgraded.
root@labadmin-VirtualBox:/home/labadmin# 

```

What difference in Ubuntu Containers and Ubuntu systems ? What is blocking the package to get installed in the containers ?

My requirement is to create a containers with some utilities with Ubuntu OS as base image:

```
FROM ubuntu:14.04
RUN apt-get update && apt-get install -y smartmontools

```