Fix “exec /gns3/ no such file or directory”

This problem can easily occur on new installations and can be hard to figure out. In a GitHub issue, the solution that fixed it for me was using Debian’s busybox:

  1. Get into a temporary folder

    cd /tmp
  2. Get and extract the Debian binary

    wget -q
    ar x busybox-static_1.30.1-4ubuntu6_amd64.deb
    tar -xf data.tar.xz
  3. Move it to the proper location, your path may differ slightly

    sudo mv ./bin/busybox /usr/lib/python3.11/site-packages/gns3server/compute/docker/resources/bin/busybox