deb-postrm - package post-removal maintainer script
DEBIAN/postrm
A package can perform several post-removal actions via maintainer scripts, by including an executable postrm file in its control archive (i.e. DEBIAN/postrm during package creation).
The script can be called in the following ways:
After the package was removed.
After the package was purged.
After the package was upgraded.
If the above upgrade call fails. The new-version is passed only since dpkg 1.18.5.
After all of the packages files have been replaced.
If preinst fails during install.
If preinst fails during upgrade of removed package. The new-version is passed only since dpkg 1.18.5.
If preinst fails during upgrade. The new-version is passed only since dpkg 1.18.5.