Provided by: dpkg-dev_1.19.7ubuntu2_all bug

NAME

       deb-preinst - package pre-installation maintainer script

SYNOPSIS

       preinst

DESCRIPTION

       A  package  can  perform  several  pre-installation  actions  via  maintainer  scripts, by
       including an executable preinst file in its control archive  (i.e.  DEBIAN/preinst  during
       package creation).

       The script can be called in the following ways:

       new-preinst install
              Before the package is installed.

       new-preinst install old-version new-version
              Before removed package is upgraded.

       new-preinst upgrade old-version new-version
              Before the package is upgraded.

       old-preinst abort-upgrade new-version
              If postrm fails during upgrade or fails on failed upgrade.

SEE ALSO

       dpkg(1).