remarkable_entware

As much as I like to Encrypt All The Things™, unless you're concerned about somebody stealing the physical device, you don't need to encrypt it. It should be possible to set up an encrypted directory with something like FUSE (though afaik FUSE doesn't run on the reMarkable), though. https://github.com/evidlo/remarkable_entware lets you install fstools.

Having used the reMarkable 1 tablet for over a year now, the hackability is so refreshing to have in a consumer device. The tablet runs Linux and you can SSH into with root access. The hacking community is quite active, one frequently asked question is how to get and run custom software on the device. There's the Entware[0] package repository for running ARMv7 software on the tablet. Recently a community maintained package repository, toltec[1] for tablet-specific software was created and is actively maintained. For Nix users, I've been helping build a Nix-based cross-compile toolchain[2], so you could easily cross-compile a good amount of the 60K packages on Nixpkgs for the tablet. Upstreaming the cross toolchain to Nixpkgs is in the works. To see what the community is up to, see the IRC channel[3], Reddit[4] and Discord server[5]. [0]