This file is indexed.

postinst is in network-manager-config-connectivity-ubuntu 1.10.6-2ubuntu1.1.

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

if [ "$1" = configure ]; then
    invoke-rc.d network-manager force-reload || true
fi