RHCSA RHCSA Shell Scripting and Automation

Question 1

Which shebang line is used to indicate a Bash script on a RHEL system?

Accepted Answer

#!/bin/bash

Answer

#!/bin/sh

Answer

#!/usr/bin/bash

Answer

#!/usr/bin/env sh

Question 2

What command is used to make a shell script executable?

Accepted Answer

chmod +x script.sh

Answer

chmod 644 script.sh

Answer

chown +x script.sh

Answer

exec script.sh

Question 3

In a Bash script, how do you store the output of the `date` command in a variable called `TODAY`?

Accepted Answer

TODAY=$(date)

Answer

TODAY=date

Answer

TODAY==date

Answer

$TODAY=date

Question 4

Which loop structure is best suited for iterating over a list of filenames in a Bash script?

Accepted Answer

for loop

Answer

while loop

Answer

until loop

Answer

select loop

Question 5

What is the exit status of a Bash command that completes successfully?

Accepted Answer

0

Answer

1

Answer

255

Answer

127

Question 6

How do you reference the first argument passed to a shell script?

Accepted Answer

$1

Answer

$0

Answer

$@

Answer

$#