You can switch to the Ubuntu old release archive in your /etc/apt/sources.d/[system, or something like that] and then do and apt update https://discourse.ubunt

You can switch to the Ubuntu old release archive in your /etc/apt/sources.d/[system, or something like that] and then do and apt update https://discourse.ubuntu.com/t/cant-update-old-ubuntu-version/17703/3 https://discourse.ubuntu.com/t/cant-update-old-ubuntu-versio...