This file is indexed.

postrm is in libnss-myhostname 0.3-6.

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
set -e

# Automatically added by dh_makeshlibs
if [ "$1" = "remove" ]; then
	ldconfig
fi
# End automatically added section


# This code was taken from nss-mdns:

log() {
    echo "$*"
}

remove_nss_entry() {
    log "Checking NSS setup..."
    # abort if /etc/nsswitch.conf does not exist
    if ! [ -e /etc/nsswitch.conf ]; then
        log "Could not find /etc/nsswitch.conf."
        return
    fi
    perl -i -pe '
        my @remove=(
            "myhostname",
        );
        sub remove {
            my $s=shift;
            foreach my $bit (@remove) {
                $s=~s/\s+\Q$bit\E//g;
            }
            return $s;
        }
        s/^(hosts:)(.*)/$1.remove($2)/e;
    ' /etc/nsswitch.conf
}

action="$1"

if [ "$action" = remove ]; then
    remove_nss_entry
fi