So, back after reading the ZINE.
Visually, I like this. I'm a monospaced font diehard :)
Setting up a tilde server. Informative, for sure. I would do a few extra things.
- move the listen port for ssh away from 22 to somewhere else; Change sshd_config, firewall and fail2ban config accordingly
- I would also try to make the OS partition read-only, but that is not as easy as it sounds
- I would probably require ssh keys to log in. But that might defeat the purpose of the machine
Other than that: nice!