How to install “ifconfig” command in my ubuntu doc

Question

I've just installed ubuntu docker image, when I execute "ifconfig" it says there's no such command, I tried apt-get install by there's no package named "ifconfig"(I can install some other images).

So how to do this? Thanks.

Answer 1

sudo apt-get install iproute2 then run ip addr show

it works..

Answer 2

On a fresh ubuntu docker image, run

apt-get update
apt-get install net-tools

These can be executed by logging into the docker container or add this to your dockerfile to build an image with the same.

Answer 3

You could also consider:

RUN apt-get update && apt-get install -y iputils-ping

(as Contango comments: you must first run apt-get update, to avoid error with missing repository).

See "Replacing ifconfig with ip"

it is most often recommended to move forward with the command that has replaced ifconfig. That command is ip, and it does a great job of stepping in for the out-of-date ifconfig.

But as seen in "Getting a Docker container's IP address from the host", using docker inspect can be more useful depending on your use case.

Answer 4

From within a Dockerfile something like the following should do the trick:

RUN apt-get update && \
     apt-get install -y net-tools

From memory it's best practice to combine the update and the package installation lines to prevent docker caching the update step which can result in out-dated packages being installed.

Installing it via the CLI or a shell script:

apt-get update && apt-get install net-tools

Answer 5

In case you want to use the Docker image as a "regular" Ubuntu installation, you can also run unminimize. This will install a lot more than ifconfig, so this might not be what you want.

Answer 6

write

sudo apt-get install net-tools