Ubuntu Manpage: upgrade-system.conf - Configuration file for upgrade-system(8)

NAME

       upgrade-system.conf - Configuration file for upgrade-system(8)

DESCRIPTION

       upgrade-system.conf  is  the  configuration file for the upgrade-system(8) Debian administration utility.
       This  file  specifies  command  options   used   for   calling   apt-get(8)   and   deborphan(1)   within
       upgrade-system(8).

       Lines starting with a hash mark ("#") and empty lines are ignored.

ENVIRONMENT

The configuration file may contain any of these environment variables:

UPGRADEOPTS
This variable specifies which one of dist-upgrade or upgrade to execute as the apt-get(8) upgrade command
and the command options. Built-in defaults are:

UPGRADEOPTS="--auto-remove --fix-broken --purge dist-upgrade"

Consult the apt-get(8) manual page to check which options are available for any particular APT version,
before setting this variable.

ORPHANOPTS
This variable specifies deborphan(1) command options. Built-in defaults are:

ORPHANOPTS="--libdevel --guess-all --no-guess-debug"

One should read the deborphan(1) manual page to check which options are available for any particular
version, before setting this variable.

CLEANOPTS
This variable selects which one of autoclean or clean to execute as the apt-get(8) cleaning command.
Built-in default is:

CLEANOPTS="clean"

Consult the apt-get(8) manual page to check which options are available for any particular APT version,
before setting this variable.

FLAUSCH
Setting this variable enables various extremely pedantic purge options.

This variable has no default value.

This feature is totally experimental; usage is strongly discouraged and should only be attempted by truly
experienced Debian administrators. It can be used to sanitize a Debian system after a distribution
upgrade or to detect packages that don't conform to the Debian Policy. Setting the variable as a command
line environment, only when needed, is considered a safer approach than adding it to upgrade-system.conf
variables.

sudo FLAUSCH=jawohl upgrade-system

FILES

       Because upgrade-system is an APT front-end, all precautions  relating  to  APT  configuration  should  be
       observed. Special attention is required to:

       /etc/apt/preferences

       To prevent untested packages from overwriting stable ones, setting this combination of APT preferences is
       recommended:

              Package: *
              Pin: release a=stable
              Pin-Priority: 990

              Package: *
              Pin: release a=testing
              Pin-Priority: 500

              Package: *
              Pin: release a=unstable
              Pin-Priority: 100

              Package: *
              Pin: release a=experimental
              Pin-Priority: 1

       This  enforces  a  priority  to  packages  from  Stable,  yet still allows ones from Testing, Unstable or
       Experimental to get installed via appropriate apt-get(8) options to override the default release.

NOTES

       In the absence of a configuration file,  upgrade-system(8)  will  take  the  above  environment  variable
       examples as fallback default values.

BUGS

       Certain  combinations of deborphan(1) options purge a dangerous quantity of packages, potentially leaving
       a system in a severely crippled state.

AUTHORS

       Copyright © 2004-2022 Martin-Éric Racine <martin-eric.racine@iki.fi>
       Copyright © 2004,2012 Christoph Schindler <hop@30hopsmax.at>
       Copyright © 2003-2004 Martin Zdrahal <martin.zdrahal@konflux.at>

LICENSE

       GPLv2+: GNU GPL version 2 or later <http://gnu.org/licenses/gpl.html>.