Challenge 08 - Scripting - Coach’s Guide

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Notes & Guidance

1. Create a script that looks up the name of the current distribution in the /etc/os-release file and prints it to the screen

student@vm01:~$ vim distribution.sh

#!/bin/bash
distribution=`grep ^NAME /etc/os-release | cut -d= -f2`
echo "The current distribution is: $distribution"

student@vm01:~$ chmod a+x distribution.sh

student@vm01:~$ ./distribution.sh

The current distribution is: "Ubuntu"

1. Create a script that reads the usernames from /etc/passwd and prints the ones with shell ending in sh

student@vm01:~$ vim users.sh

#!/bin/bash
users=`grep sh$ /etc/passwd | cut -d: -f1`
echo "Users with login shell:"
echo $users

student@vm01:~$ chmod a+x users.sh

student@vm01:~$ ./users.sh

Users with login shell:
root student omsagent nxautomation anna mary peter rick"

1. Create a script that adds two integers requested from the user and print the sum

student@vm01:~$ vim sum.sh

#!/bin/bash
echo "Enter two numbers: "
read N1 N2
sum=$(( N1 + N2 ))
echo "The sum of $N1 and $N2 is $sum"

student@vm01:~$ chmod a+x sum.sh

student@vm01:~$ ./sum.sh

Enter two numbers:
2 3
The sum of 2 and 3 is 5