This file is indexed.

prerm is in libelmersolver-6.1 6.1.0.svn.5396.dfsg2-4ubuntu1.

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

# Remove alternatives links
if [ "$1" = "remove" ]; then
  update-alternatives --remove elmersolver /usr/lib/elmersolver-6.1
fi