systemd[1]: Starting Daily apt upgrade and clean activities...

[Lee <ler762@gmail.com>]

Apparently the syslog message
  systemd[1]: Starting Daily apt upgrade and clean activities...
is caused by systemd / apt-daily.timer - correct?

# sudo systemctl status apt-daily.timer
● apt-daily.timer - Daily apt download activities
     Loaded: loaded (/lib/systemd/system/apt-daily.timer; enabled;
vendor preset: enabled)
     Active: active (waiting) since Fri 2022-01-28 15:16:57 EST; 1
weeks 3 days ago
    Trigger: Wed 2022-02-09 00:33:19 EST; 10h left
   Triggers: ● apt-daily.service

I'm sure I don't want any automatic apt upgrade happening, but what
are the "clean activities"?

TIA
Lee