I highly recommend 1Password. It’s cross platform, including Linux, and it’s not only a great and sort l super secure password manager, but it also does 2FA codes and if you use their auto fill tool, it will also paste the 2FA code to clipboard so you can paste it in seamlessly.

Everything is full encrypted and needs a really long, unique to you, key to decrypt. So no one will be hacking this anytime soon. Even 1Password cannot open your vault.