Provided by: unattended-upgrades_2.9.1+nmu2ubuntu2_all bug


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


       unattended-upgrade [options]


       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 accepts the following options:

       -h, --help
              help output

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

              detailed APT/LibAPT output for debugging

       -v, --verbose
              show verbose output

              Just simulate installing updates, do not actually do it

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

              do not perform upgrade in minimal steps


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


       unattended-upgrade is written by Michael Vogt <>

       This manual page was originally written by Michael Vogt <>


       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

                                          March 1, 2019                     unattended-upgrade(8)