Question 42 of 979
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XK0-006 Practice Question: A developer needs to run a one-time script after…
A developer needs to run a one-time script after the network is up on a systemd-based server. Which unit type should be used?
⚠ Common exam trap
Candidates often confuse `oneshot` with `simple` or `forking`, mistakenly thinking a one-time script needs to remain running (`simple`) or fork into the background (`forking`), but systemd's `oneshot` is explicitly designed for tasks that exit after completion.
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
✓
oneshot
The `oneshot` unit type is correct because it is designed for services that run a single task to completion and then exit, making it ideal for a one-time script that must execute after the network is up. In systemd, `oneshot` units can be configured with `RemainAfterExit=no` (the default) to indicate they do not need to stay running, and they support ordering dependencies like `After=network-online.target` to ensure the network is available before the script runs.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
forking
Why it's wrong here
Forking units are for daemons that fork.
- ✗
exec
Why it's wrong here
Exec is not a standard service type.
- ✗
simple
Why it's wrong here
Simple units start a long-running process.
- ✓
oneshot
Why this is correct
Oneshot units run a single command and then exit.
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Last reviewed: Jun 11, 2026
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