Question

Write a function named getComputerinfo that displays disk usage, memory usage, the uptime, currently logged users, and password information. (Hint, you can use free (free memory), df (free disk), uptime, w, and cat /etc/shadow) commands to complete your task

Answer 1

Keep answer in file1.sh

chmod file1.sh #this is to give executable permission to file

./filename.sh #this is to run the file

The answer is below:

#!/bin/sh

# Function

function getComputerinfo()

{

    # Here I have used many empty echos to print some empty line between different outputs.

    echo "Disk usage statistics..."

    echo ""

    # Displays free disk space of many drives in human readable format(with -H option)

    df -H

    echo ""

    echo ""

    echo "Free memory statistics..."

    echo ""

    # Displays free memory in human readable format(using -h option)

    free -h

    echo ""

    echo ""

    echo "System uptime..."

    echo ""

    # Displays uptime(with p option you get only uptime stats)

    uptime -p

    echo ""

    echo ""

    echo "Users logged in to system..."

    echo ""

    # w command to display logged in users and their info

    w

    echo ""

    echo ""

    echo "Password information(You need to enter password)"

    echo ""

    # All sensitive details of users are stored in /etc/shadow file which can only be accessed with super user mode

    sudo cat /etc/shadow

}

getComputerinfo