Current File : //etc/systemd/system/timers.target.wants/update-notifier-motd.timer

[Unit]
Description=Check to see whether there is a new version of Ubuntu available
After=network.target network-online.target systemd-networkd.service NetworkManager.service connman.service

[Timer]
OnCalendar=Sun *-*-* 06:00:00
RandomizedDelaySec=1w
Persistent=true

[Install]
WantedBy=timers.target