Problem:
You have a remote, headless computer that is running @tailscale@hachyderm.io and that needs to have its Tailscale binary updated. If you "ssh" into the host, and do e.g. "apt update; apt upgrade" when it comes time to replace the Tailscale binary you'll lose your TCP connection. The upgrade will happen but you'll lose the link and you'll just have to hope that you can get back in correctly.
Solution:
Use "mosh" instead of "ssh" to connect to the system that you want to update. It uses the same auth system as ssh but the actual connection is over UDP and it's very, very tolerant of temporary loss of connection. Losing the connection briefly does not interrupt the mosh session the way that ssh would drop.
