Debian motd

00-header

#!/bin/sh
#
#    00-header - create the header of the MOTD
#    Copyright (C) 2009-2010 Canonical Ltd.
#
#    Authors: Dustin Kirkland <kirkland@canonical.com>
#
#    This program is free software; you can redistribute it and/or modify
#    it under the terms of the GNU General Public License as published by
#    the Free Software Foundation; either version 2 of the License, or
#    (at your option) any later version.
#
#    This program is distributed in the hope that it will be useful,
#    but WITHOUT ANY WARRANTY; without even the implied warranty of
#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#    GNU General Public License for more details.
#
#    You should have received a copy of the GNU General Public License along
#    with this program; if not, write to the Free Software Foundation, Inc.,
#    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.

[ -r /etc/lsb-release ] && . /etc/lsb-release

if [ -z "$DISTRIB_DESCRIPTION" ] && [ -x /usr/bin/lsb_release ]; then
        # Fall back to using the very slow lsb_release utility
        DISTRIB_DESCRIPTION=$(lsb_release -s -d)
fi

printf "Welcome to %s (%s %s %s)\n" "$DISTRIB_DESCRIPTION" "$(uname -o)" "$(uname -r)" "$(uname -m)"
echo

10-sysinfo

#!/bin/bash

# date
date=`date`

# System load
load=`cat /proc/loadavg | awk '{print $1}'`

# Root usage
root_usage_percent=`df -h / | awk '/\// {print $(NF-1)}'`
root_usage_size=` df -h / | awk '/\// {print $(NF-3)}'`
root_size=`df -h / | awk '/\// {print $(NF-4)}'`
root_usage=`printf "%s, %s of %s" $root_usage_percent $root_usage_size $root_size`

# Mem usage
memory_usage=`free -m | awk '/Mem:/ { total=$2; used=$3 } END { printf("%3.1f%%", used/total*100)}'`
swap_usage=`free -m | awk '/Swap/ { printf("%3.1f%%", $3/$2*100) }'`

# Processes
processes=`ps aux | wc -l`

# Logged user
users=`users | wc -w`

# Uptime
time=`uptime | grep -ohe 'up .*' | sed 's/,/\ hours/g' | awk '{ printf $2" "$3 }'`

echo "  System information as of $date"
echo
printf "  System load:\t\t\t%s\n" $load
printf "  Usage of /:\t\t\t%s\n" "$root_usage"
printf "  Memory usage:\t\t\t%s\n" $memory_usage
printf "  Swap usage:\t\t\t%s\n" $swap_usage
printf "  Processes:\t\t\t%s\n" $processes
printf "  Users logged in:\t\t%s\n" $users
printf "  System uptime:\t\t%s\n" "$time"

# IP Address
nets=`ip a | grep -E 'eno[0-9]+:|ens[0-9]+:|enp[0-9]+s[0-9]+:|eth[0-9]+:|eth[0-9]+@if[0-9]+:|wlp[0-9]+s[0-9]+:' | awk '{ print $2 }' | sed 's/://g'`
for net in $nets
do
  ipv4=`ip a s $net | grep inet | awk '{ print $2 }' | head -1`
  printf "  IPv4 address for %s:\t%s" $net $ipv4
  printf "\n"
  ipv6=`ip a s $net | grep inet6 | awk '{ print $2 }' | head -1`
  printf "  IPv6 address for %s:\t%s" $net $ipv6
done

echo
echo

90-footer

#!/bin/sh

# Pending reboot
if [ -f /var/run/reboot-required ]; then
  echo '*** System restart required ***'
fi