Please this script into /etc/periodic/15m/motd to generate a message of the day every 15 mins

andy-motd-generator

#!/bin/sh

UPTIME_DAYS=$(expr `cat /proc/uptime | cut -d '.' -f1` % 31556926 / 86400)
UPTIME_HOURS=$(expr `cat /proc/uptime | cut -d '.' -f1` % 31556926 % 86400 / 3600)
UPTIME_MINUTES=$(expr `cat /proc/uptime | cut -d '.' -f1` % 31556926 % 86400 % 3600 / 60)
FIRST=yes
for iface in $(ls -A /sys/class/net | grep eth)
do
  INTERFACE="`echo "$iface" | sed 's/.*/\u&/'` Address: `ifconfig $iface | grep "inet addr" | awk -F: '{print $2}' | awk '{print $1}'`"
  if [ $FIRST == "no" ]; then
    INTERFACES=`printf "$INTERFACE\n"`
    FIRST=no
  else
    INTERFACES=`printf "$INTERFACES\n     #  $INTERFACE\n"`
  fi
done
PUBLIC_IPV4=$(curl -s http://169.254.169.254/metadata/v1/interfaces/public/0/ipv4/address)
if [ "$PUBLIC_IPv4" != "not found" ]; then
  INTERFACES=`printf "$INTERFACES\n     #  Public Address: $PUBLIC_IPV4\n"`
fi

cat > /etc/motd << EOF
     #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++#
     #                                                                            #
     #                                WELCOME!                                    #
     #                                                                            #
     #                            This is a server.                               #
     #                                                                            #
     #                                                                            #
     #+++++++++++++++++++++++++++++++ SERVER INFO ++++++++++++++++++++++++++++++++#
     #                                                                            #
     #  Name: `hostname`
     #  Uptime: $UPTIME_DAYS days, $UPTIME_HOURS hours, $UPTIME_MINUTES minutes
     #  CPU: `cat /proc/cpuinfo | grep 'model name' | head -1 | cut -d':' -f2`
     #  Memory: `free -m | head -n 2 | tail -n 1 | awk {'print $2'}`
     #  Swap: `free -m | tail -n 1 | awk {'print $2'}`
     #  Disk: `df -h / | awk '{ a = $2 } END { print a }'`
     #  Distro: `uname -v` with `uname -r`
     #  CPU Load: `cat /proc/loadavg | awk '{print $1 ", " $2 ", " $3}'`
     #  Free Memory: `free -m | head -n 2 | tail -n 1 | awk {'print $4'}`
     #  Free Swap: `free -m | tail -n 1 | awk {'print $4'}`
     #  Free Disk: `df -h / | awk '{ a = $2 } END { print a }'`
     #	$INTERFACES
     #                                                                            #
     #++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++#
EOF