XK0-006 Automation, Orchestration, and Scripting Practice Question
A Linux administrator writes a Bash script and includes the line `#!/bin/bash` at the top. What is the purpose of this line?
⚠ Common exam trap
XK0-006 often tests whether candidates confuse the shebang with runtime options like `set -x` or with shell invocation flags, so they must recognize it purely as interpreter selection.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
It specifies the interpreter to execute the script.
The `#!/bin/bash` line is a shebang that tells the operating system which interpreter to use when executing the script. When the script is run as an executable, the kernel reads this line and invokes `/bin/bash` to process the file.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
It sets the script to run in the background.
Why it's wrong here
The shebang names the interpreter that executes the script; background execution is instead achieved by appending an ampersand or using nohup. It would be the answer if the line contained an ampersand or the question asked how to detach a process from the terminal.
- ✗
It enables debugging mode.
Why it's wrong here
Debugging is enabled by invoking bash with -x or adding set -x inside the script, not by the shebang, which only selects the interpreter. It would be the answer if the question asked how to trace command execution line by line during troubleshooting.
- ✓
It specifies the interpreter to execute the script.
Why this is correct
The shebang instructs the kernel to launch the named program, here `/bin/bash`, to interpret the script's contents when executed directly. This satisfies the stem's requirement that the line defines which interpreter runs the file, rather than the current shell or a compiled binary.
- ✗
It defines a variable for the script.
Why it's wrong here
The shebang is a kernel directive identifying the interpreter path; variable assignment uses name=value syntax without a leading hash. It would be the answer if the line read something like PATH=/usr/bin, which genuinely assigns a value for later expansion.
Go deeper
Related to this question
Learn chapter
File Permissions and Ownership
Key term
Kernel
The kernel is the core program of an operating system that manages hardware resources and provides essential services for all other software to run.
Key term
Bash script
A Bash script is a text file containing a sequence of commands for the Unix shell Bash, allowing users to automate repetitive tasks and streamline system administration on Linux and macOS.
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JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed September 2026 · checked against the official CompTIA exam blueprint
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