- Internal IP(s)            =  192.168.1.100
- OS Version                = Ubuntu 15.10 wily
- Load Averages             = 1 Min: 2.57 5 Min: 2.08 15 Min: 1.58
- System Uptime             = 20 hours, 45 minutes
- Platform Data             = 4.2.0-35-generic x86_64 x86_64 GNU/Linux
- CPU Usage (average)       = 11.4%
- Memory Free (Real)        = 1.6G
- Memory Free (Cache)       = 12G
- Swap In Use               = 306M
- Disk Space Used
         /                  =  10G / 102G 11%
      /dir                  = 457G / 985G 47%
  /movies2                  =  77M / 3.0T 1%
   /movies                  = 4.6T / 5.0T 93%
       /tv                  = 1.2T / 5.0T 25%
      /tv2                  = 4.0T / 5.0T 81%
  -------------------------------------------
          movies total      = 4.6T / 8.0T 58%
              tv total      = 5.2T /  10T 53%
           grand total      =  11T /  19T 54%


the code used :

#!/bin/bash

drivelist="$(df -H | awk '$1 ~ /\/dev/ { print $6 }')"
multidrive="$(df | awk '$1 ~ /\/dev/ { print $6 }' | sed -e 's/\///' -e 's/[0-9]//' -e '/^$/d' | sort | uniq -d)"

awk -v date="$(date)" \
    -v hostname="$(hostname)" \
    -v extip="$(dig +short myip.opendns.com @resolver1.opendns.com)" \
    -v intip="$(ip r | awk '{print $9}' | tail -n2 | tr '\n' ' ')" \
    -v release="$(lsb_release -d |  awk '{ print $2, $3 }')" \
    -v codename="$(lsb_release -c |  awk '{ print $2 }')" \
    -v loadavg="$(awk '{ print "1 Min:", $1, "5 Min:", $2, "15 Min:", $3 }' /proc/loadavg)" \
    -v sysup="$(uptime -p | sed 's/up //')" \
    -v platdata="$(uname -orpi)" \
    -v cpuuse="$(top -bn 1 | awk 'NR>7{s+=$9} END {print s/4}')" \
    -v memfreal="$(free -h | head -n 2 | tail -n 1 | awk \{'print $4'\})" \
    -v memfcache="$(free -h | head -n 3 | tail -n 1 | awk \{'print $4'\})" \
    -v swap="$(free -h | tail -n 1 | awk \{'print $3'\})" \
    -v format="%s %-25s %s %s\n" \
    -v format2="%s %-25s %s %s %s\n" \
    'BEGIN {
            print "Server Status"
            print date
            printf format, "-", "Server Name", "=", hostname
            printf format, "-", "External IP", "=", extip
            printf format, "-", "Internal IP(s)", "=", intip
            printf format2, "-", "OS Version", "=", release, codename
            printf format, "-", "Load Averages", "=", loadavg
            printf format, "-", "System Uptime", "=", sysup
            printf format, "-", "Platform Data", "=", platdata
            printf "%s %-25s %s %s%s\n", "-", "CPU Usage (average)", "=", cpuuse, "%"
            printf format, "-", "Memory Free (Real)", "=", memfreal
            printf format, "-", "Memory Free (Cache)", "=", memfcache
            printf format, "-", "Swap In Use", "=", swap
            printf "%s %s\n", "-", "Disk Space Used"
           }'

for drives in $drivelist; do
    if df "$drives" | grep -q "$drives"; then
        df -H | awk -v drives="$drives" '$6 == drives { printf "%10s %18s %4s %s %4s %s\n", $6, "=", $3, "/", $2, $
    fi
done | sort

printf "  " && printf "%0.s-" {1..43} && printf "\n"

for drives in $multidrive; do
    if [[ $(df | grep -c /$drives) -gt 1 ]]; then
        df -H $(df -H | awk -v drives=$drives '$6 ~ drives { print $6 }' | sort) --total | awk -v drives=$drives '$
    fi
done

df -H --total | awk 'END { printf "%22s %6s %4s %s %4s %s\n", "grand total", "=", $3, "/", $2, $5 }'