I built something like this (a bash script wrapper around oathtool) but ended up outputting the text to a picture with ImageMagick. This is much more polished, though. Using a proprietary program for two-factor (Google authenticator or Authy) is something I like to avoid and oathtool fits the bill. However, it's not something I'd recommend without caveats: Encrypt your tokens using GPG or something like that. Failing that, at least keep these on an encrypted hard drive, and don't put them on external media. Keep it on as few devices as you can, and not on a shared machine.
Edit: Suppose I should add the link. https://gitlab.com/elagost/linux-2fa
I build it for the clockworkpi device, so there were more constrains than a normal desktop system. https://www.clockworkpi.com/