#!/bin/bash

# Run this script with "bash <filename>".

# Exit on error.
set -e

FILE='/etc/motd'
DISABLED_EXT='disabled'

if [ -f "${FILE:-/tmp/none}.${DISABLED_EXT:-/oops}" ]; then
    mv -v "${FILE:-/tmp/none}.${DISABLED_EXT:-/oops}" \
    "${FILE:-/tmp/none}"
else
    mv -v "${FILE:-/tmp/none}" \
    "${FILE:-/tmp/none}.${DISABLED_EXT:-/oops}"
fi