/etc/cron.daily/update-notifier-common is in update-notifier-common 0.119ubuntu8.1.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 | #!/bin/sh
set -e
[ -x /usr/lib/update-notifier/package-data-downloader ] || exit 0
# Try to rerun any package data downloads that failed at package install time.
/usr/lib/update-notifier/package-data-downloader
|