I wrote a blog on how to do it a couple years back if anyone is interested in a "tutorial": https://2byt.es/post/totp/ https://2byt.es/post/totp/ It's for the

I wrote a blog on how to do it a couple years back if anyone is interested in a "tutorial": https://2byt.es/post/totp/ https://2byt.es/post/totp/ It's for the Pi as that's the target audience but it should apply generally for OpenSSH. There's also a sister post about improving your "first factor" for those still using passwords: https://2byt.es/post/totp2/ https://2byt.es/post/totp2/