docker: executable file not found in $PATH": unknown

Question

Using AWS instance based on ubuntu 18.04, Docker version 19.03.10, build 9424aeaee9. I got the following error:

docker: Error response from daemon: OCI runtime create failed: container_linux.go:345: starting container process caused "exec: \"python\": executable file not found in $PATH": unknown.

after trying to execute the code:

docker run --name test1 c73eada5a5fa

where "c73eada5a5fa" is my container id after being built using:

sudo docker build -t my_username/repository .

Here is my docker:

FROM ubuntu:18.04
COPY . /PFE_exec
CMD ["make", "PFE_exec"]
CMD ["sudo","apt","install","unzip"]
CMD ["echo","requirements installed!"]
CMD ["unzip","home/ubuntu/PFE/aa.zip"]
CMD ["python","home/ubuntu/PFE/test.py"]
CMD ["python","home/ubuntu/PFE/test2.py"]
CMD ["python","home/ubuntu/PFE/test3.py"]

Using python3 instead of python doesn't resolve the problem as well. I don't understand where is the problem. Any help? Thank you in advance!

Answer 1

There is no python or python3 pre-installed in ubuntu:18.04 image, if you want to use python in your Docker, you probably want to change your base image to python image , eg FROM python:3 .

Besides, in your Dockerfile, there should be only one CMD , what you need is RUN instruction instead of CMD .