For example the script try-to-fix-low-on-disk-space doesn't send notifications. This is because the echo NOTIFY statements are not sent to systemd's journal.

How to reproduce:

• Check free disk space: sudo btrfs filesystem usage / | grep df
• Create a huge file close to what's left on the drive: fallocate -l 818.7GiB ~/.cache/mozilla/firefox/test
• Auditd will trigger the try-to-fix-low-on-disk-space but no desktop notification is sent
• echo statement doesn't appear in the output of sudo systemctl status auditd