/bin/sh: 1: sudo: not found when running dockerfile

Question

This is the content of my Dockerfile.

FROM ubuntu

RUN sudo apt-get update

RUN sudo apt-get install -y wget

CMD wget -O- -q http://ifconfig.me/ip

When I run the Dockerfile to build a docker image, I get the below error:

/bin/sh: 1: sudo: not found

Can you please help me in solving the above error?

Possible duplicate of [How to use sudo inside a docker container?](https://stackoverflow.com/questions/25845538/how-to-use-sudo-inside-a-docker-container) — yeputons, May 22 '19 at 05:04
After removing SUDO from dockerfile, i am getting a new error E: Unable to locate package wget — mspms, May 22 '19 at 05:17
@yeputons I would not say it is a duplicate of [How to use sudo inside a docker container?](https://stackoverflow.com/questions/25845538/how-to-use-sudo-inside-a-docker-container) since it does not mention the error message, and the answer to this question here is already the first sentence in the question there. — questionto42, Feb 14 '21 at 22:26
for large Dockerfile files, make sure the `USER` variable isn't being assigned/changed. This will make all further commands run as that user and not root. — rob, May 22 '23 at 10:24

Abhishek D K · Answer 1 · 2019-12-21T06:44:02.540

49

by default docker container runs as root user
remove the sudo from Dockerfile and run again.

edited Dec 21 '19 at 06:44

answered May 22 '19 at 05:11

Abhishek D K

3

also prompt with # signifies root user – Abhishek D K Apr 09 '20 at 04:20
https://www.digitalocean.com/community/questions/how-to-fix-docker-got-permission-denied-while-trying-to-connect-to-the-docker-daemon-socket this should help you for Docker Daemon permission related – Abhishek D K Oct 25 '20 at 14:42

score 13 · Answer 2 · answered May 22 '19 at 05:45

13

Your commands in the Dockerfile already run as root during docker build. For this reason you do not need to use sudo

answered May 22 '19 at 05:45

Mihai

score 6 · Answer 3 · answered May 22 '19 at 05:26

6

You don't need sudo in this case. Change Dockerfile as below -

FROM ubuntu

RUN apt-get update -y && \ 
    apt-get install -y wget

CMD wget -O- -q http://ifconfig.me/ip

PS - Merge the RUN statements as much as possible.

answered May 22 '19 at 05:26

vivekyad4v

3 Answers3