SSHing to My ReMarkable from Anywhere

A reMarkable 2 runs Linux and allows SSH access, but connecting over USB and looking up its address each time is inconvenient. This guide describes how to make the tablet reachable wirelessly by a stable name, so a computer on the same network can connect with the short command `ssh rm` and open a root shell. The author accepts some loss of security for convenience and reports that the method works on a reMarkable 2 with firmware 3.27.1.0; newer devices may require Developer Mode.

First, enable SSH over Wi-Fi on the tablet, then configure its built-in systemd services to advertise and resolve its address through mDNS. This means enabling `MulticastDNS` in both the system-wide resolved configuration and the WLAN network-link configuration, restarting the relevant services, and checking that `wlan0` reports mDNS as active. The connecting computer must also support mDNS, which macOS and most modern Linux systems do; Avahi can be installed if needed. Finally, add an SSH client alias that points `rm` to `remarkable.local`, logs in as root with the specified private key, and uses keepalives to help prevent idle connections from dropping. Once configured, the name should continue to work after tablet restarts, provided both devices are on the same network.