Selecting Bash as a script interpreter | LPIC-1 102-500 Exam original practice question

105.2Standard

Specify /bin/bash as the interpreter on the first line of an executable script.

Which line is correct?

Hint 1: Focus on the requirement

Identify what must change and what must remain unchanged. Then choose the command whose scope matches that requirement.

Hint 2: Check each command's role

Separate commands that display information, change state, remove data, or affect a child process.

#!/bin/bash: Correct. The kernel uses /bin/bash to interpret the script.
#/bin/bash: Incorrect. Without ! it is treated as an ordinary comment.
#!/bin/sh bash: Incorrect. This passes bash as an argument to /bin/sh rather than selecting Bash itself.
#!/usr/bin/bash -c: Incorrect. It does not match the requested interpreter and adds an unsuitable -c.

Detailed explanation

Correct#!/bin/bash

Correct. The kernel uses /bin/bash to interpret the script.

Incorrect#/bin/bash

Incorrect. Without ! it is treated as an ordinary comment.

Incorrect#!/bin/sh bash

Incorrect. This passes bash as an argument to /bin/sh rather than selecting Bash itself.

Incorrect#!/usr/bin/bash -c

Incorrect. It does not match the requested interpreter and adds an unsuitable -c.

An example you can run in a temporary verification environment.

script=$(mktemp); printf '%s\n%s\n' '#!/bin/bash' 'printf shebang-ok' > "$script"; chmod u+x "$script"; "$script"; rm -f -- "$script"

shebang-ok

Foundation review

Check whether the command acts on the current shell, a new process, an existing process, or a file.

Use the supplied command and compare the output with the expected result.

Question IDKP-105-618

EnvironmentGNU Bash 5.2 / 一時ファイル

Last technical review2026-08-13