#! /bin/bash
#
# BASH script to extract and (formatted) display of useful system 
# information. Tested on Red Hat Enterprise Linux edition but is
# expected to run on other distributions with little or no modification.
#
# Questions, comments and/or concerns should be sent to 
# mail@sgowtham.net
# 
# First written: Gowtham, Thu, 05 Apr 2007 14:25:02 -0400
# Last modified: Gowtham, Fri, 06 Apr 2007 11:09:25 -0400
#
export OFFSET=25

# Current User, etc
export TODAY=`date`
export USER=`whoami`
export DISK_USAGE=`du -sh $HOME/ | awk '{print $1}'`

echo
printf "%"$OFFSET"s %s\n"  "TODAY :"       "$TODAY"
printf "%"$OFFSET"s %s\n"  "USER :"        "$USER"
printf "%"$OFFSET"s %s\n"  "USER ID :"     "$UID"
printf "%"$OFFSET"s %s\n"  "SHELL :"       "$SHELL"
printf "%"$OFFSET"s %s\n"  "HOME FOLDER :" "$HOME"
printf "%"$OFFSET"s %s\n"  "DISK USAGE :"  "$DISK_USAGE"

# Hardware, Kernel, OS, etc
export UNAME="/bin/uname"
export NAME=`$UNAME -n`
export HARDWARE=`$UNAME -m`
export PROCESSOR=`$UNAME -p`
export PLATFORM=`$UNAME -i`
export OPERATING_SYSTEM=`$UNAME -o`
export KERNEL_RELEASE=`$UNAME -r`
export KERNEL_VERSION=`$UNAME -v`

echo
printf "%"$OFFSET"s %s\n"  "HOST NAME :"        $NAME
printf "%"$OFFSET"s %s\n"  "HARDWARE :"         $HARDWARE
printf "%"$OFFSET"s %s\n"  "PROCESSOR :"        $PROCESSOR
printf "%"$OFFSET"s %s\n"  "PLATFORM :"         $PLATFORM
printf "%"$OFFSET"s %s\n"  "OPERATING SYSTEM :" $OPERATING_SYSTEM
printf "%"$OFFSET"s %s\n"  "KERNEL RELEASE :"   $KERNEL_RELEASE
printf "%"$OFFSET"s %s\n"  "KERNEL VERSION :"   "$KERNEL_VERSION"

# CPU, etc
export CPU_NUMBER=`cat /proc/cpuinfo | grep "model name" | \
                   sed 's/model name\t: //' | wc -l`
export CPU_MODEL=`cat /proc/cpuinfo | grep "model name" | \
                  sed 's/model name\t: //' | head -1`
export CPU_CACHE=`cat /proc/cpuinfo | grep "cache size" | \
                  sed 's/cache size\t: //' | head -1`
export TOTAL_MEMORY=`cat /proc/meminfo | head -1 | sed 's/MemTotal://' | \
                     sed 's/^[ \t]*//;s/[ \t]*$//'`
export SWAP_MEMORY=`cat /proc/meminfo | grep "SwapTotal" |\
                    sed 's/SwapTotal://' | sed 's/^[ \t]*//;s/[ \t]*$//'`
export LOAD_AVERAGE=`cat /proc/loadavg | awk '{print $1 " " $2 " " $3 }' | \
                     sed 's/^[ \t]*//;s/[ \t]*$//'`
export UPTIME=`cat /proc/uptime | awk '{ x = $1 / 86400; printf "%d\n", x}'`

echo
printf "%"$OFFSET"s %s\n"  "CPU # :"         "$CPU_NUMBER" 
printf "%"$OFFSET"s %s\n"  "CPU MODEL :"     "$CPU_MODEL" 
printf "%"$OFFSET"s %s\n"  "CPU CACHE :"     "$CPU_CACHE" 
printf "%"$OFFSET"s %s\n"  "MEMORY (RAM) :"  "$TOTAL_MEMORY" 
printf "%"$OFFSET"s %s\n"  "SWAP :"          "$SWAP_MEMORY" 
printf "%"$OFFSET"s %s\n"  "LOAD AVERAGE :"  "$LOAD_AVERAGE" 
printf "%"$OFFSET"s %s\n"  "UPTIME :"        "$UPTIME+ day(s)" 

# Network, etc
export IP_ADDRESS0=`/sbin/ifconfig | grep -A 5 eth0 | grep "Bcast" | \
                    awk '{print $2}' | awk -F ':' '{print $2}'`
export MAC_ADDRESS0=`/sbin/ifconfig | grep -A 5 eth0 | grep "HWaddr" | \
                     awk '{print $NF}'`
export IP_ADDRESS1=`/sbin/ifconfig | grep -A 5 eth1 | grep "Bcast" | \
                    awk '{print $2}' | awk -F ':' '{print $2}'`
export MAC_ADDRESS1=`/sbin/ifconfig | grep -A 5 eth1 | grep "HWaddr" | \
                     awk '{print $NF}'`

echo
printf "%"$OFFSET"s %s\n"  "MAC ADDRESS (eth0) :"   "$MAC_ADDRESS0" 
printf "%"$OFFSET"s %s\n"  "IP ADDRESS (eth0) :"    "$IP_ADDRESS0" 
if [ "$MAC_ADDRESS1" != "" ];
then
  printf "%"$OFFSET"s %s\n"  "MAC ADDRESS (eth1) :" "$MAC_ADDRESS1" 
fi
if [ "$IP_ADDRESS1" != "" ];
then
  printf "%"$OFFSET"s %s\n"  "IP ADDRESS (eth1) :"  "$IP_ADDRESS1" 
fi

echo