/etc/update-motd.d/90-vagrant -- dynamic Message of the Day with added Vagrant information (brief)

90-vagrant

#!/bin/sh

[ -f /etc/os-release-vagrant ] || exit 0

# Add information about this particular Vagrant box e.g., version, etc.
. /etc/os-release-vagrant

# Calculate the level of indentation.
_indent() { echo "(${#1} + 75) / 2" | bc; }

readonly HEADER="$BUILD_NAME (${BUILDER_TYPE})"
readonly VERSION="Box version: ${VERSION}"

printf "\n%*s\n" "$(_indent "$HEADER")" "$HEADER"
cat <<'EOS'
                 _____ _____ _____ _____ _____ _____ _____
                |  |  |  _  |   __| __  |  _  |   | |_   _|
                |  |  |     |  |  |    -|     | | | | | |
                 \___/|__|__|_____|__|__|__|__|_|___| |_|
EOS
printf "%*s\n%*s\n" \
  "$(_indent "$BUILD_DATE")" "$BUILD_DATE" \
  "$(_indent "${VERSION}")" "$VERSION"

exit 0

os-release-vagrant

BUILD_NAME="ubuntu-14.04-amd64"
BUILD_NUMBER=0
BUILD_TIMESTAMP=1424534915
BUILD_DATE="Sat Feb 21 16:08:35 UTC 2015"
BUILDER_TYPE="vmware"
VERSION="0.1.0"