deb-preinst(5)

NAME
deb-preinst - package pre-installation maintainer script

SYNOPSIS
DEBIAN/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 a removed package is upgraded.

    The new-version is passed only since dpkg 1.18.5.

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

    The new-version is passed only since dpkg 1.18.5.

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

SEE ALSO
dpkg(1).