====== Automatic apt upgrades ======
Recently noticed the following on my daily cron output:
<code>
/etc/cron.daily/apt:
Package 'mysql-common' has conffile prompt and needs to be upgraded manually
</code>

It turns out automatic upgrade of packages is turned on by default in Ubuntu LTS 12.04 Precise Pangolin!!!

So Any case, did the following to disable in file: /etc/apt/apt.conf.d/20auto-upgrades

Changed
<code>
APT::Periodic::Unattended-Upgrade "1";
</code>
To
<code>
APT::Periodic::Unattended-Upgrade "0";
</code>

===== On Xenial =====
Open ''/etc/apt/apt.conf.d/50unattended-upgrades'' and comment out all lines under block ''Unattended-Upgrade::Allowed-Origins''

Uninstall ''unattended-upgrades''

Also update ''/etc/systemd/system/network-online.target.wants/networking.service'', ''TimeoutStartSec'' from 5min to 1min


===== Also (did this on Bionic) =====
<code bash>
systemctl disable packagekit
</code>

===== On Groovy =====
Open ''/etc/apt/apt.conf.d/50unattended-upgrades'' and comment out all lines under block ''Unattended-Upgrade::Allowed-Origins''

Uninstall ''unattended-upgrades''

<code bash>
systemctl disable packagekit
</code>

Disable in file: /etc/apt/apt.conf.d/20auto-upgrades

Changed
<code>
APT::Periodic::Unattended-Upgrade "1";
</code>
To
<code>
APT::Periodic::Unattended-Upgrade "0";
</code>

<code bash>
cd /etc/cron.daily
chmod ugo-x apt-compat
chmod ugo-x update-notifier-common
</code>

----

Keywords: Ubuntu Initial Setup, apt-get, aptitude