- A
Place the script in /etc/rc.d/rc.local
Why wrong: Placing the script in /etc/rc.d/rc.local runs as root, not as the specific user, and does not load the user's environment.
- B
Add an entry to ~/.xprofile
Why wrong: ~/.xprofile is executed only during graphical login, not at system boot, and is not suitable for boot-time execution.
- C
Create a systemd user unit in ~/.config/systemd/user/
Creating a systemd user unit in ~/.config/systemd/user/ ensures the script runs in the user's own session context at boot, with full environment variables and D-Bus session.
- D
Add the script to the user's crontab with @reboot
Why wrong: @reboot entries in a user's crontab run as that user, not as root. However, cron provides a stripped-down environment (no D-Bus, systemd user session), making it less ideal for scripts that depend on the full user environment.
Systemd User Unit — Run Script at Boot with User Environment
This EX200 practice question tests your understanding of essential tools. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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.
A script needs to be run at system boot for a specific user. Which method ensures the script runs with that user's environment?
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
Create a systemd user unit in ~/.config/systemd/user/
Option C is correct because systemd user units, placed in ~/.config/systemd/user/, are executed in the user's own session context, inheriting the user's environment variables, PATH, and D-Bus session. This ensures the script runs with the specific user's environment at boot, as systemd starts the user manager (systemd --user) early in the boot process for each enabled user.
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.
- ✗
Place the script in /etc/rc.d/rc.local
Why it's wrong here
Placing the script in /etc/rc.d/rc.local runs as root, not as the specific user, and does not load the user's environment.
- ✗
Add an entry to ~/.xprofile
Why it's wrong here
~/.xprofile is executed only during graphical login, not at system boot, and is not suitable for boot-time execution.
- ✓
Create a systemd user unit in ~/.config/systemd/user/
Why this is correct
Creating a systemd user unit in ~/.config/systemd/user/ ensures the script runs in the user's own session context at boot, with full environment variables and D-Bus session.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Add the script to the user's crontab with @reboot
Why it's wrong here
@reboot entries in a user's crontab run as that user, not as root. However, cron provides a stripped-down environment (no D-Bus, systemd user session), making it less ideal for scripts that depend on the full user environment.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often assume @reboot in crontab runs with the full user environment, but in reality cron provides a stripped-down environment (e.g., no D-Bus, no systemd user session), making it unsuitable for scripts that depend on user-specific services or graphical session variables.
Detailed technical explanation
How to think about this question
Systemd user units leverage the systemd --user instance, which is spawned by the systemd user manager (user@.service) and runs in a dedicated cgroup with its own environment. This allows services to start at boot even before the user logs in, using the 'WantedBy=default.target' directive, and they inherit the user's environment from the user manager's context, including variables set in ~/.config/environment.d/*.conf. A real-world scenario is running a user-level backup script that needs access to the user's SSH keys and $HOME directory without requiring an interactive login.
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.
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FAQ
Questions learners often ask
What does this EX200 question test?
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: Create a systemd user unit in ~/.config/systemd/user/ — Option C is correct because systemd user units, placed in ~/.config/systemd/user/, are executed in the user's own session context, inheriting the user's environment variables, PATH, and D-Bus session. This ensures the script runs with the specific user's environment at boot, as systemd starts the user manager (systemd --user) early in the boot process for each enabled user.
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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Last reviewed: Jun 24, 2026
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