non-interactive Debian installation or update

Hi, I'm looking for a way to automate an upgrade/update of already installed Debian systems. Since there are several packages that require user interaction this cannot be done over night or at remote sites without the intervention of a system administrator.

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Hi, I'm looking for a way to automate an upgrade/update of already installed Debian systems. Since there are several packages that require user interaction this cannot be done over night or at remote sites without the intervention of a system administrator.