RHCSA RHCSA Shell Scripting and Automation 3

Question 1

Which command redirects both stdout and stderr to a file called `output.log`?

Accepted Answer

command > output.log 2>&1

Answer

Redirecting stdout to a file with `>` and then redirecting stderr (`2>`) to stdout (`&1`) sends both streams to the same file.

Question 2

In Bash, what does the `test -f /etc/passwd` command check?

Accepted Answer

Whether /etc/passwd exists and is a regular file

Answer

The `-f` flag in `test` returns true if the given path exists and is a regular (non-directory) file.

Question 3

What does `#!/bin/bash -x` at the top of a script do?

Accepted Answer

Enables debug mode, printing each command before execution

Answer

The `-x` flag enables shell trace mode, printing each command and its arguments to stderr before execution.

Question 4

Which construct in Bash allows you to define a reusable block of commands?

Accepted Answer

function

Answer

Bash supports defining reusable blocks using the `function` keyword or the `name() { }` syntax.

Question 5

What is the purpose of `set -e` at the beginning of a Bash script?

Accepted Answer

Exit the script immediately if any command returns a non-zero status

Answer

`set -e` causes the script to exit immediately when any command exits with a non-zero (failure) status.

RHCSA Exam Practice Test