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# Introduction
How do you know a machine running [Debian](https://debian.org) works,
or at least looks repairable? This is a description minimal
requirements for a working or repairable Debian system. It also
specifies how to verify those requirements are met.
This document is meant to be processed by the
[Subplot](https://subplot.tech) tool, which can produce a test program
to verify the acceptance criteria, based on scenarios specified here.
# Acceptance criteria
This chapter contains requirements and scenarios that verify they are
met. To generate code from the scenarios and run it, use the following
commands:
~~~sh
subplot codegen debian.subplot -o test.py
python3 test.py --env DEBIAN_HOST=xyzzy --env HOME=$HOME --log test.log
~~~
This runs the scenarios against the host `xyzzy`, and writes a log
file to `test.log`. The environment variable `HOME` is copied to the
test program so that it can use your normal SSH configuration.
## Can log in via SSH as the `debian` user and become root with sudo
_Requirement: The system administrator can log in and do things as
root._
The `debian` user is used here. It's the usual user on cloud images
produced by Debian, or that use the Debian version of the `cloud-init`
software.
~~~scenario
given a Debian system
when I run, as debian, sudo id -u
then stdout is exactly "0\n"
~~~
## Can log in and update package lists
_Requirement: The system administrator can update the lists of
packages the APT package manager needs._
Justification: Without this, it's not possible to find out about new
packages, new versions of packages, and there's no hope to apply bug
fixes or security updates. Thus, this is a minimal, if not sufficient,
requirement to be able to maintain a Debian system.
Note that we don't upgrade packages as part of the scenario. That
might break the system.
~~~scenario
given a Debian system
when I run, as debian, sudo apt update
then command is successful
~~~
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