This file is indexed.

postrm is in libwrap0 7.6.q-26.

This file is a maintainer script. It is executed when installing (*inst) or removing (*rm) the package.

The actual contents of the file can be viewed below.

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#!/bin/sh -e

if [ "$1" = "purge" ] && \
   [ "$(dpkg-query --show libwrap0 2> /dev/null | wc -l)" = 1 ]; then
  rm -f /etc/hosts.allow /etc/hosts.deny
fi