This file is indexed.

postinst is in libapache2-mod-nss 1.0.12-2.

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

CERTDIR=/etc/apache2/nssdb

if [ "$1" = configure ]; then
    if dpkg --compare-versions "$2" lt-nl "1.0.12-2"; then
        # buggy gencert created this
	if [ -f /0 ]; then
            rm -f /0
        fi
    fi
    if [ ! -e $CERTDIR/key3.db ]; then
        /usr/share/libapache2-mod-nss/gencert \
		$CERTDIR > $CERTDIR/install.log 2>&1
        echo "libapache2-mod-nss certificate database generated."
    fi

    # Make sure that the database ownership is setup properly.
    find $CERTDIR -user root -name "*.db" -exec /bin/chgrp www-data {} \;
    find $CERTDIR -user root -name "*.db" -exec /bin/chmod g+r {} \;
fi