I defined unattended-upgrade configuration in /etc/apt/apt.conf.d/50unattended-upgrades file. It works fine, I receive an email notification when an upgrade is applied.
The notificatoin email shows this subject: unattended-upgrades result for debian.example.com: SUCCESS.
Where does that debian.example.com comes from? I could not find it in the configuration file. How could I add my VPS name instead? (I am using Exim4, and /etc/email-addresses is empty, is this related?)
Thanks a lot!
The email subject is constructed as follows:
subject = _(
"{hold_flag}{reboot_flag} unattended-upgrades result for "
"{machine}: {result}").format(
hold_flag=hold_flag_str, reboot_flag=reboot_flag_str,
machine=host(), result="SUCCESS" if res else "FAILURE").strip()
The machine name is the result of host(), which is defined as
def host():
# type: () -> str
return socket.getfqdn()
So debian.example.com is your FQDN, which you can see by running
hostname --fqdn
This is usually stored in /etc/hostname; changes to that should show up in the unattended-upgrade emails.
