I want to be able to automatically restore login information when starting a disposable VM

[apparatus]

Then try this:

@unman

Put a line in /rw/.config/rc.local like this:
echo "nameserver 9.9.9.9 " > /etc/resolv.conf

How to overwrite Qubes Virtual DNS 10.139.1.1, 10.139.1.2

You asked a simple question - how do I overwrite /etc/resolv.conf from Qubes default? The simple answer is: Put a line in /rw/.config/rc.local like this: echo "nameserver 9.9.9.9 " > /etc/resolv.conf That is the simple answer to the question you asked. The difficult t you have is that your problem is not encompassed by that simple question. That is why I told you you would have to deal with the warning message that you received. etc/resolvconf/update.d/libc: Warning: /etc/resolv.conf …

[Nakaya_kita]

ありがとう！debian-11ではなく、dafault-dvmの方のテンプレートでrc.localに追記し再起動したところ無事自動でネットにつながるようになりました。あとは自動ログインの設定ですが、上の方のポストにあったように思うのでそちらを見ながら設定していこうと思います。長かったが、成し遂げられて嬉しいです。