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

The shebang `#!/bin/bash` explicitly invokes the Bash interpreter located at `/bin/bash` on RHEL systems.

Question 2

What command is used to make a shell script executable?

Accepted Answer

chmod +x script.sh

Answer

The `chmod +x` command adds the execute permission bit to a file, allowing it to be run as a script.

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

Command substitution using `$(command)` captures the standard output of a command and assigns it to a variable.

Question 4

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

Accepted Answer

for loop

Answer

The `for` loop is ideal for iterating over a finite list of items such as filenames or strings in Bash.

Question 5

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

Accepted Answer

0

Answer

A successful command returns exit status `0`, while any non-zero value indicates an error or abnormal termination.

RHCSA Exam Practice Test