This file is indexed.

postrm is in openjdk-7-jre-headless 7u51-2.4.6-1ubuntu4.

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

set -e

multiarch=x86_64-linux-gnu
jdirname=java-7-openjdk-amd64
etcdir=/etc/java-7-openjdk

case "$1" in
purge)
    if [ -z "$jdirname" ] || [ -z "$etcdir" ]; then
	echo >&2 "$(basename $0): Internal error"
	exit 1
    fi
    # removals of config files in /etc is handled by dpkg

    # XXX should remove /etc/.java ???
    ;;
esac