Interactive shells can be launched into containers, to have a look at configurations and to better understand what might go wrong. Podman/Docker allows to alter files inside of the container and save these changes. Singularity/Apptainer containers are not writeable, but acts like a normal executable with access to host files.
```sh title="interactive containers"
```sh
# using podman
$ podman run -it localhost/flexpartv11-master:2464aef /bin/bash
