Looks like, where Windows used Ctrl+[1-9] to go to the Nth tab in any window, Linux likes to use Alt+[1-9] for this. I'd previously corrected VS Code's behavior, which seemed odd AF at the time, so it used Ctrl, like other Windows apps, and my keybindings file brought that behavior to Linux for me. Lovely! But since everything else seems to use Alt, I think maybe instead of bludgeoning the whole OS to use Ctrl like I'm used to, I should just adapt and start using Alt. Everywhere. Ugh.

OMG, yes, it's going to be okay!!! 😁🍾🥳🎆 My backup of my WSL home dir happened to include my .ssh directory. That included a public key to allow me to login on the server as one of my standard users. And that user has permissions to elevate himself to root! 😎 With this, I can figure out everything else. I can just reset the email password on the other email account, and I can update my passwordless login and SSH keys. It's all going to be okay. 😌