ubuntu-22.04.3-desktop-amd64/casper/filesystem/usr/lib/systemd/system/fwupd-refresh.timer

[Unit]
Description=Refresh fwupd metadata regularly
ConditionVirtualization=!container

[Timer]
OnCalendar=*-*-* 6,18:00
RandomizedDelaySec=12h
Persistent=true

[Install]
WantedBy=timers.target