====== Unattended Upgrades ======
===== Quelle =====
  * https://wiki.debian.org/UnattendedUpgrades

===== Setup =====
<code bash>
apt update
nano /etc/aliases
</code>
Add the following line:
<code txt>
root:   hostmaster@domain.de
</code>
<code bash>
newaliases
apt install postfix -y
</code>
  * <code txt>
> Satellite system
> FQDN
> SMTP relay host
</code>
<code bash>
apt install unattended-upgrades -y
dpkg-reconfigure -plow unattended-upgrades
<<Yes>>
nano /etc/apt/apt.conf.d/50unattended-upgrades
</code>
Uncomment ->
<code txt>
Unattended-Upgrade::Mail "root";
</code>

Optional, postifx testen:
<code bash>
apt install mailutils -y
mail root
</code>
  * <code txt>
Cc:
Subject: Test
Hallo!
Ctrl+D
</code>
<code bash>
tail -f /var/log/mail.log
</code>
''%%Oct 11 17:39:56 debian postfix/smtp[31370]: 8594940A46: to=<hostmaster@domain.de>, orig_to=<root@debian.domain.local>, relay=smtp.domain.de[1.2.3.4]:25, delay=0.14, delays=0/0/0.11/0.03, dsn=2.0.0, status=sent (250 2.0.0 Ok: queued as B19BF48C21)%%''