Provided by: dpkg-dev_1.19.7ubuntu3_all
deb-preinst - package pre-installation maintainer script
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.