Question

Once you are in the Linux environment, perform the following steps:

• Set an environment variable for USER that holds the value of your name.

For this submission, you will write a BASH shell program that meets the following requirements:

• Clear the screen.
• Display to the user what the program will do and that the program is starting.
• Display to the user the string “Hello“ and the value of the USER environment variable.
• Output a blank line.
• Display to the user a sentence to include the actual date of the day that it is when you run the program.
• Output another blank line.
• By using the Cut command, obtain the USER value and output only the first field, along with a sentence about who the user is.
• Output another blank line.
• Display to the user the uname value with a –s option, as well as the –m option to show the processor for the system.
• Output another blank line.
• Display to the user a sentence that includes the actual uptime of the system that you are running the program on.
• Output another blank line.
• Display a goodbye message to the user.
• End the program.

Answer 1

Setting the environment variable $USER with the export command:

The script bashscript.sh is mentioned below. The important commands used in the script are:

• echo -> To print messages on the terminal. echo "" prints a blank line.
• clear -> To clear the terminal screen.
• date +%F -> to display the today's date; shown in YYYY-MM-DD
• cut -f1 -d " " -> cut takes the value of $USER and divides it into the columns based on the delimiter space(specified by -d " "), takes the first column (specified by -f1) and returns it. So, Jennifer is returned
• uname -> -s shows the kernel name, that is Linux, and -m signifies the processor architecture, that is i686 at my VM.
• uptime -> Command to show the uptime of the machine
• exit -> To exit from the program

#!/bin/bash

clear

echo "########################################"
echo "This script will start now.."
echo "It will show the current user,"
echo "the system uptime, and the current time"
echo "along with the system type and "
echo "processor architecture of the machine"
echo "########################################"
echo ""

echo "Hello" $USER
echo ""
echo "The script is run on the date:" `date +%F`
echo ""
echo "Your first name is:" `echo $USER | cut -f1 -d " "`
echo ""
echo "The system name is:" `uname -s` "and the processor type is: " `uname -m`
echo ""
echo "The uptime of the system is:" `uptime`
echo ""

echo "GoodBye!!"
exit 1

The IDE screenshot is below:

Execution of the script after making it executable with chmod + x bashscript.sh