# voxl-emulator won't start Source: https://forum.modalai.com/topic/536/voxl-emulator-won-t-start Category: General Questions (https://forum.modalai.com/category/2/general-questions) Posted: 2021-11-01 21:10:54 UTC by jaredjohansen Replies: 1 · Views: 1029 ## jaredjohansen · 2021-11-01 21:10:54 UTC I have an Ubuntu 20.04 machine with docker installed. I have followed [these instructions](https://docs.modalai.com/install-voxl-docker/) to install `voxl-docker`. I have downloaded the latest voxl-cross, voxl-emulator, and voxl-hexagon from [here](https://developer.modalai.com/asset). I have used `docker load` to create docker images from each of these tar.gz files. When I try to run the emulator, it gives me the error below: ``` jared@jared-ubuntu:~/voxl-docker$ docker images REPOSITORY TAG IMAGE ID CREATED SIZE voxl-hexagon v1.1 f5790a3358ca 19 minutes ago 6.38GB voxl-emulator v1.7 c0709663abe6 20 minutes ago 3.4GB voxl-cross v1.1 77eda1fa0a0e 21 minutes ago 1.06GB roskinetic-xenial v1.0 bfb82886c74f 21 months ago 1.63GB registry 0.9.1 56cfd79a53f5 5 years ago 423MB jared@jared-ubuntu:~/voxl-docker$ voxl-docker -i voxl-emulator:v1.7 -e "/bin/bash" launching image: voxl-emulator:v1.7 with the following command: docker run --rm -it --net=host --privileged -w /home/jared --volume=/dev/bus/usb:/dev/bus/usb -e LOCAL_USER_ID=0 -e LOCAL_USER_NAME=root -e LOCAL_GID=0 -v /home/jared/voxl-docker:/home/root:rw -w /home/root voxl-emulator:v1.7 /bin/bash docker: Error response from daemon: OCI runtime create failed: container_linux.go:380: starting container process caused: exec: "/bin/bash": stat /bin/bash: no such file or directory: unknown. ``` As I understand it, It's telling me that there is no such thing as /bin/bash in the container. I don't really believe that is true, because this [webpage](https://docs.modalai.com/install-voxl-docker/#use-of-voxl-docker-script) uses the `bash` command: `voxl-docker -i voxl-emulator -e "/bin/bash build.sh"`. Can you help me understand what I am doing wrong (and why this is not working)? =============== What I am trying to (eventually) do is to build my own docker image (in Ubuntu) that I can `adb push` to my VOXL and run it there. As I understand it, if I `docker build ` on my Ubuntu machine, once I transfer it to the VOXL, it won't work because the architecture is not the same. If I want to `docker build` on my Ubuntu machine and have it work on the VOXL, I believe I will need to run the voxl-emulator and `docker build` inside of that. Is that correct? ## Reply by jaredjohansen · 2021-11-01 22:28:21 UTC Update: I completely [removed docker](https://askubuntu.com/questions/935569/how-to-completely-uninstall-docker) and voxl-docker from my system. I rebooted, [reinstalled docker](https://www.digitalocean.com/community/tutorials/how-to-install-and-use-docker-on-ubuntu-20-04), and [followed these steps to install voxl-docker](https://docs.modalai.com/install-voxl-docker/). Now, I get a different error (same as [here](https://forum.modalai.com/topic/414/can-t-run-the-voxl-emulator-docker-image/4)) : ``` jared@jared-ubuntu:~/voxl-docker$ voxl-docker -i voxl-emulator -e "/bin/bash" launching image: voxl-emulator with the following command: docker run --rm -it --net=host --privileged -w /home/jared --volume=/dev/bus/usb:/dev/bus/usb -e LOCAL_USER_ID=0 -e LOCAL_USER_NAME=root -e LOCAL_GID=0 -v /home/jared/voxl-docker:/home/root:rw -w /home/root voxl-emulator /bin/bash standard_init_linux.go:228: exec user process caused: exec format error ``` I followed the instructions at the [link](https://www.stereolabs.com/docs/docker/building-arm-container-on-x86/). The first two commands ran without any issues. I had to modify the last one to fit my architecture: ``` sudo apt-get install qemu binfmt-support qemu-user-static docker run --rm --privileged multiarch/qemu-user-static --reset -p yes jared@jared-ubuntu:~/voxl-docker$ docker run --rm -t amd64/ubuntu uname -m Unable to find image 'amd64/ubuntu:latest' locally latest: Pulling from amd64/ubuntu 7b1a6ab2e44d: Pull complete Digest: sha256:7cc0576c7c0ec2384de5cbf245f41567e922aab1b075f3e8ad565f508032df17 Status: Downloaded newer image for amd64/ubuntu:latest x86_64 ``` That worked. Now the voxl-emulator appears to work too: ``` jared@jared-ubuntu:~/voxl-docker$ voxl-docker -i voxl-emulator -e "/bin/bash" launching image: voxl-emulator with the following command: docker run --rm -it --net=host --privileged -w /home/jared --volume=/dev/bus/usb:/dev/bus/usb -e LOCAL_USER_ID=0 -e LOCAL_USER_NAME=root -e LOCAL_GID=0 -v /home/jared/voxl-docker:/home/root:rw -w /home/root voxl-emulator /bin/bash + USER_ID=0 + USER_NAME=root + GID=0 + getent group 0 root:x:0: + echo 'Starting with UID : 0' Starting with UID : 0 + useradd --shell /bin/bash -u 0 -g 0 -o -c '' -M root useradd: user 'root' already exists + addgroup root users + export HOME=/home/root + HOME=/home/root + ls -ld /home/root drwxrwxr-x 8 james host_group 4096 Nov 1 21:45 /home/root + echo 'root ALL=(ALL) NOPASSWD: ALL' + ls -l /etc/sudoers.d/ total 8 -rw-r--r-- 1 root root 30 Nov 23 2020 james -rw-r--r-- 1 root root 29 Nov 1 22:26 root + cat /etc/sudoers.d/root root ALL=(ALL) NOPASSWD: ALL + chmod 777 /tmp + chmod 711 /usr/bin/sudo + chmod +s /usr/bin/sudo + ls -l /usr/local/bin/su-exec -rwxr-xr-x 1 root root 7660 Aug 14 2018 /usr/local/bin/su-exec + ls -l /bin/bash -rwxrwxrwx 1 root root 959344 Aug 12 2018 /bin/bash + echo 'exec /usr/local/bin/su-exec root /bin/bash' exec /usr/local/bin/su-exec root /bin/bash + exec /usr/local/bin/su-exec root /bin/bash bash-4.3# ```