kazulog@sv1:~$ printf 'APT::Periodic::Update-Package-Lists "0";\nAPT::Periodic::Unattended-Upgrade "0";\n' | sudo tee /etc/apt/apt.conf.d/20auto-upgrades
APT::Periodic::Update-Package-Lists "0";
APT::Periodic::Unattended-Upgrade "0";
kazulog@sv1:~$ apt-config dump APT::Periodic::Unattended-Upgrade
APT::Periodic::Unattended-Upgrade "0";
kazulog@sv1:~$ sudo systemctl disable --now apt-daily-upgrade.timer
Removed '/etc/systemd/system/timers.target.wants/apt-daily-upgrade.timer'.
kazulog@sv1:~$ systemctl list-timers 'apt-daily*' --all --no-pager
NEXT                        LEFT LAST                        PASSED UNIT            ACTIVATES
Fri 2026-09-11 05:56:09 JST  13h Thu 2026-09-10 13:30:25 JST      - apt-daily.timer apt-daily.service

1 timers listed.
kazulog@sv1:~$ sudo systemctl enable --now apt-daily-upgrade.timer
Created symlink '/etc/systemd/system/timers.target.wants/apt-daily-upgrade.timer' → '/usr/lib/systemd/system/apt-daily-upgrade.timer'.
kazulog@sv1:~$ printf 'APT::Periodic::Update-Package-Lists "1";\nAPT::Periodic::Unattended-Upgrade "1";\n' | sudo tee /etc/apt/apt.conf.d/20auto-upgrades
APT::Periodic::Update-Package-Lists "1";
APT::Periodic::Unattended-Upgrade "1";