This EX200 practice question tests your understanding of essential tools. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
Which TWO methods can be used to permanently set the system's hostname to 'server01.example.com'?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
hostnamectl set-hostname server01.example.com
Option A is correct because `hostnamectl set-hostname server01.example.com` is the systemd-based command that permanently sets the hostname by writing to `/etc/hostname` and applying the change immediately via the `hostnamed` service. This is the recommended method on RHEL 8/9 systems, as it updates both the transient and static hostnames, ensuring persistence across reboots.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✓
hostnamectl set-hostname server01.example.com
Why this is correct
Updates the static hostname persistently.
Related concept
Read the scenario before looking for a memorised answer.
Legacy method for SysVinit; not used with systemd.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates confuse setting the hostname with hostname resolution, picking option B (editing `/etc/hosts`) because they think it permanently sets the hostname, when it only affects local DNS-like lookups and does not change the system's actual hostname.
Detailed technical explanation
How to think about this question
The `hostnamectl` command interacts with the `systemd-hostnamed` service, which manages three hostname types: static (stored in `/etc/hostname`), transient (set by DHCP or kernel), and pretty (for display). Writing directly to `/etc/hostname` is equivalent to setting the static hostname, but `hostnamectl` also triggers a D-Bus signal to update the transient hostname immediately, avoiding a reboot. In real-world scenarios, using `hostname` alone (option D) can cause confusion when the hostname reverts after a reboot, leading to network service failures.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
TExam Day Tips
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A practitioner preparing for the EX200 exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Essential Tools — This question tests Essential Tools — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: hostnamectl set-hostname server01.example.com — Option A is correct because `hostnamectl set-hostname server01.example.com` is the systemd-based command that permanently sets the hostname by writing to `/etc/hostname` and applying the change immediately via the `hostnamed` service. This is the recommended method on RHEL 8/9 systems, as it updates both the transient and static hostnames, ensuring persistence across reboots.
What should I do if I get this EX200 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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