This file is indexed.

postrm is in linux-grsec-base 6.

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" ];
then
  echo "Removing grsec groups" >&2
  groupdel grsec-tpe || echo "Error removing group grsec-tpe" >&2
  groupdel grsec-sock-all || echo "Error removing group grsec-sock-all" >&2
  groupdel grsec-sock-clt || echo "Error removing group grsec-sock-clt" >&2
  groupdel grsec-sock-srv || echo "Error removing group grsec-sock-srv" >&2
  groupdel grsec-proc || echo "Error removing group grsec-proc" >&2
fi