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="--autoremove --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>.