unattended-upgrade - automatic installation of security (and other) upgrades

       unattended-upgrade is written by Michael Vogt <mvo@ubuntu.com>

       This manual page was originally written by Michael Vogt <mvo@ubuntu.com>

       The  configuration  is  done  via  the apt configuration mechanism. The default configuration file can be
       found at /etc/apt/apt.conf.d/50unattended-upgrades

       Copyright  (C)  2005-2009 Canonical

       There is NO warranty.  You may redistribute this software under the terms of  the   GNU  General   Public
       License.  For more information about these matters, see the files named COPYING.

                                                  March 1, 2019                            unattended-upgrade(8)

       This program can download and install security upgrades automatically and unattended, taking care to only
       install  packages  from the configured APT source, and checking for dpkg prompts about configuration file
       changes. All  operations  are  logged  to  /var/log/unattended-upgrades/unattended-upgrades.log  and  the
       package manager (dpkg) output is logged to /var/log/unattended-upgrades/unattended-upgrades-dpkg.log

       This  script  is  the  backend  for  the  APT::Periodic::Unattended-Upgrade option and designed to be run
       periodically  by  APT's  systemd   service   (apt-daily-upgrade.service)   or   from   cron   (e.g.   via
       /etc/cron.daily/apt).

       unattended-upgrade - automatic installation of security (and other) upgrades

       unattended-upgrade accepts the following options:

       -h, --help
              help output

       -d, --debug
              extra debug output into /var/log/unattended-upgrades/unattended-upgrades.log

       --apt-debug
              detailed APT/LibAPT output for debugging

       -v, --verbose
              show verbose output

       --dry-run
              Just simulate installing updates, do not actually do it

       --minimal-upgrade-steps
              perform upgrade in minimal steps (cancel with SIGINT). This is the default now.

       --no-minimal-upgrade-steps
              do not perform upgrade in minimal steps

unattended-upgrade [options]