Linux Shell Script To Collect Linux System Information

#!/bin/bash

#clear console
clear

#just echo welcome messages
echo “This is information provided by $0 . Program starts now.”

echo “Hello, $USER”

echo

#print today’s date
echo “Today’s date is `date`, this is week `date +”%V”`.”

echo

#list of currently loged user via w command.
echo “These users are currently connected:”

w | cut -d ” ” -f 1 – | grep -v USER | sort -u

echo

#info about system with command uname and keys -m and -s
echo “This is `uname -s` running on a `uname -m` processor.”

echo

#info about uptime, using uptime command
echo “This is the uptime information:”

uptime

echo

#info about free memory via free command
echo “Free memory:”

free

echo

#info about disk usage
echo “Disk usage:”

df -kh

echo

Output

Below is the script output.

This is information provided by ./system_info.sh . Program starts now.

Hello, yevhen

Today’s date is Sunday, March 3 2013 22:31:43 +0200, this is week 09.

These users are currently connected:

yevhen

This is Linux running on a i686 processor.

This is the uptime information:

22:31:43 up 1:24, 2 users, load average: 0.45, 0.18, 0.07

Free memory:

total used free shared buffers cached

Mem: 3374792 1589476 1785316 0 96720 725652

-/+ buffers/cache: 767104 2607688

Swap: 4192924 0 4192924

Disk usage:

Filesystem Size Used Avail Use% mounted
/dev/sda1 42G 5,5G 35G 14% /

tmpfs 1,7G 0 1,7G 0% /lib/init/rw

udev 1,7G 168K 1,7G 1% /dev

tmpfs 1,7G 160K 1,7G 1% /dev/shm

/dev/sda6 184G 26G 149G 15% /home