PeriodicUpdates (unattended-upgrades) — by Debian Wiki

intermediatepageCC BY-SA 4.0 (for changes after 24 July 2025; see page footer)

Explains how automatic updates work and how to change when they run by overriding the apt-daily timers with systemctl edit, ideally with a randomised delay on shared servers.

Quick steps

sudo systemctl edit apt-daily.timer
sudo systemctl edit apt-daily-upgrade.timer
Clear OnCalendar= then set a new time

Paraphrased from the source. Menus can differ by version, so check the original for full details.

Read the full article on wiki.debian.org

Source: PeriodicUpdates (unattended-upgrades) by Debian Wiki. Licence: CC BY-SA 4.0 (for changes after 24 July 2025; see page footer).

Source reviewed: 2026-11-02
Link checked: 2026-11-02
Tested hands-on: Not by Oddbyte.Me

systemdtimersaptunattended-upgrades

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